19. Miloshev, N., Trifonova, P.. WHAT THE NATIONAL GEOINFORMATION CENTER IS GOING TO CHANGE? Bulgarian Geophysical Journal, 42, НИГГГ-БАН, 2019, ISSN 2683-1317, DOI:10.34975/BGJ-2019.42.4, 37- 45.
20. Miloshev, N., Trifonova, P., Georgiev I.. IMPORTANCE OF THE NATIONAL GEOINFORMATION CENTER FOR NATURAL AND ANTHROPOGENIC RISKS PREVENTION IN BULGARIA. International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM 2020, p. 583-590, ISSN:1314-2704, SJR (Scopus):0.232
21. Bojilova, R., Mukhtarov, P., & Miloshev, N. (2020). Climatology of the index of the biologically active ultraviolet radiation for Sofia. An empirical forecast model for predicting the UV-index, COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES, 73(4), 531-538, IF 0.343 (2019), SJR 0.218 (2019)
22. Ivanov, A., I. Georgiev, N. Dimitrov (2019) ANALYSIS OF MONTHLY SEA LEVEL DATA FROM VARNA TIDE GAUGE STATION. Bulgarian Geophysical Journal, 2019, Vol. 42, pp77-82, ISSN 1311-753X. DOI: 10.34975/bgj-2019.42.7
23. Gadzhev G., Ganev K., Mukhtarov P., MODELLING OF THE SEASONAL SULPHUR AND NITROGEN DEPOSITIONS OVER THE BALKAN PENINSULA BY CMAQ AND EMEP-MSC-W Lecture Notes in Computer Science, vol XXXXX. Springer, Cham (подготвена за печат) (Q4, IF:0.402)
24. Gadzhev G. Ivanov V., HPC MODELLING OF THE SEASONAL SULPHUR AND NITROGEN DEPOSITIONS OVER THE BALKAN PENINSULA BY CMAQ AND EMEP-MSC-W Springer Series: Studies in Systems, Decision and Control (SSDC) (в процес на рецензиране)
25. LOCAL TIME DEPENDENCE OF THE IONOSPHERIC RESPONSE TO GEOMAGNETIC DISTURBANCES OVER BULGARIA Author/s: Rumiana Bojilova, Plamen Mukhtarov, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
26. 8GIS BASED ANALYSIS FOR EVALUATION OF HUMAN RISK DUE TO EARTHQUAKES IN BULGARIA Author/s: Prof. DSc. Dimcho Solakov, Assoc. Prof. Petya Trifonova, Metodi Metodiev, Assoc. Prof. Stela Simeonova, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
27. EFFECTS OF SYNCHRONIZATION BETWEEN ULTRA LOW FREQUENCY GEOMAGNETIC COMPONENTS VARIATIONS AND SEISMIC NOISE Author/s: Maria Chamati, Emil Oynakov, Prof. DSc. Dimcho Solakov, Assoc. Prof. Irena Aleksandrova, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
28. GEOMAGNETIC FIELD ELEMENTS OF THE BULGARIAN TERRITORY FOR 2020.0 EPOCH Author/s: Metodi Metodiev, Assoc. Prof. Petya Trifonova, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
29. CORRELATION BETWEEN GRAVITY AND MAGNETIC FIELDS ON THE TERRITORYOF BULGARIA Author/s: Emil Oynakov, Assoc. Prof. DSc. Dimcho Solakov, Prof. Boyko Ranguelov, Prof. DSc. Stefan Dimovsky, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
30. SYNCHRONIZATION OF MICRO-SEISMIC NOISE AND ITS STATISTICAL PARAMETERS BEFORE RIDGECREST EARTHQUAKE M7.1 ON 6-TH OF JULY 2019 Author/s: Assoc. Prof. Emil Oynakov, Prof. DSc. Dimcho Solakov, Assoc. Prof. Irena Aleksandrova, Maria Chamati, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
31. SEISMIC NOISE AT BULGARIAN ANTARCTIC SEISMIC STATION AND INFLUENCE FROM SITE SELECTION Author/s: Assoc. Prof. Liliya Dimitrova, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
32. DETERMINISTIC SEISMIC SCENARIOS FOR THE CITY OF BLAGOEVGRAD Author/s: Prof. DSc. Dimcho Solakov, Assoc. Prof. Stela Simeonova, Plamena Raykova, Prof. Boyko Rangelov, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
33. ASSESSMENT OF THE EFFECTS OF STRONG EARTHQUAKES ON THE CITY OF BLAGOEVGRAD Author/s: Assoc. Prof. Dimitar Stefanov, Prof. DSc. Dimcho Solakov, Jordan Milkov, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
34. ANALYSIS OF SEISMICITY IN SOFIA SEISMOGENIC ZONE Author/s: Prof. DSc. Dimcho Solakov, Assoc. Prof. Stela Simeonova, Plamena Raykova, Assoc. Prof. Irena Aleksandrova, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
35. STUDY ON THE GEODYNAMIC PROCESSES FOR THE AREA OF THE SOUTHWEST BULGARIA USING INSAR DATA Author/s: Assoc. Prof. Mila Atanasova-Zlatareva, Assoc. Prof. Nikolay Dimitrov, Hristo Nikolov, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
36. MONITORING OF GEODYNAMIC PROCESSES IN THE AREA AROUND SOFIA Author/s: Assoc. Prof. Nikolay Dimitrov, Prof. DSc. Ivan Georgiev, Prof. Radoslav Nakov, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
37. MONITORING OF THE LANDSLIDE PROCESSES AT THE „DALGIYA YAR“ LANDSLIDE Author/s: Assoc. Prof. Nikolay Dimitrov, Prof. DSc. Ivan Georgiev, Assoc. Prof. Mila Atanasova, PhD Anton Ivanov, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
38. ANALYSIS OF SEA LEVEL DATA AT VARNA AND BURGAS TIDE GAUGE STATIONS Author/s: PhD Anton Ivanov, Assoc. Prof. DSc. Ivan Georgiev, Assoc. Prof. Nikolay Dimitrov, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
39. INFLUENCE OF THE DANUBE AND TOPOLOVETS RIVERS ON THE WATER SOURCE OF THE TOWN OF VIDIN Author/s: PhD Maria Temelkova, National Institute of Geophysics Geodesy and Geography Bulgarian Academy of Sciences, Bulgaria
40. REGION OF KARDZHALI COMBINED LOCAL AND TRANSBORDER EARTHQUAKE IMPACTS’ ANALYSIS Author/s: Assoc. Prof. KIRIL HADJIYSKI, National Institute of Geophysics Geodesy and Geography, Bulgaria
41. Hristo Nikolov, Mila Atanasova, Plamen Ivanov, Boyko Berov. Studying the slope deformations in a Bulgarian mountain by multitemporal DInSAR data processing. Proc. SPIE 11533, Image and Signal Processing for Remote Sensing XXVI, 1153319 20 September 2020; doi: 10.1117/12.2573945, Proceedings of SPIE – The International Society for Optical Engineering-9. SJR (Scopus) 0.215
42. Dimitrov N., P. Danchev, I. Georgiev (2019) Investigation of the impact of atmospheric refraction on precision leveling measurements. Bulgarian Geophysical Journal, 2019, Vol. 42, pp28-36, ISSN 1311-753X. DOI: 10.34975/bgj-2019.42.3.
43. Nicola D’Agostino, Marianne Métois, Rexhep Koci, Llambro Duni, Neki Kuka, Athanassios Ganas, Ivan Georgiev, François Jouanne, Nataša Kaludjerovic, Radovan Kandic (2020). Active crustal deformation and rotations in the southwestern Balkans from continuous GPS measurements. Earth and Planetary Science Letters, Volume 539, 1, June 2020, 116246.
44. Kenyeres, A., J. G. Bellet, C. Bruyninx, A. Caporali, F. De Doncker, B. Droscak, A. Duret, P. Franke, I. Georgiev, R. Bingley, L. Huisman, L. Jivall, O. Khoda, K. Kollo, A. I. Kurt, S. Lahtinen, J. Legrand, B. Magyar, D. Mesmaker, K. Morozova, J. Nágl, S. Özdemir, X. Papanikolaou, E. Parseliunas, G. Stangl, M. Ryczywolski, O. B. Tangen, M. Valdes, J. Zurutuza, M. Weber (2019). Regional integration of long term national dense GNSS network solutions. GPS Solutions 23:122 https://doi.org/10.1007/s10291-019-0902-7.
45. Niagolov, I., Results of recent actualization of Bulgarian significant reservoirs inflow, ANNUAL OF THE UACG, SOFIA ,vol.53, Issue 1, 2020, pp.106-113
46. Dimitrova L., G. Georgieva, J. Afzali , D. Dimitrov. Broad band seismic sensors and their application: case study – Livingston Island, Antarctica. Proceedings of XXIX International Scientific Symposium “Metrology and Metrology Assurance “2019.IEEE. Section VI.2, p.140-144. DOI: 10.1109/MMA46899.2019
47. Dimitrova, L., Georgieva, G., Trifonova, P., E. Oynakov, V. Protopopova, M. Metodiev. Seismic sources and Earth structure in the transition zone between Fore-Balkan unit and Moesian platform, NE Bulgaria. Acta Geod Geophys., 55(2), 183-202 (2020). ISSN 2213-5812. https://doi.org/10.1007/s40328-020-00288-3. IF 0.942, SJR= 0.314
48. Todor Branzov, Krassimira Ivanova, Velichka Milousheva, Service approach to the development of online educational products in the National Geoinformation Center of Bulgaria, 20th International Scientific Multidisciplinary Conference on Earth and Planetary Sciences, SGEM 2020, Section Informatics, 16-25 August, 2020, Albena, Bulgaria.
49. Marin Galabov, Plamena Zlateva, Some financial scenarios for recovery of natural disaster damages based on insurances and credits. 20th International Scientifc Multidisciplinary Conference on Earth and Planetary Sciences, SGEM 2020, Section: Environmental Economics, 16-25 August, 2020, Albena, Bulgaria.
50. Todor Branzov, Krassimira Ivanova, Velichka Milousheva, Integration in and between Earth Observation Research Centers for Achieving Sustainable Development, ITDRR-2020, http://itdrr.unwe.bg/.
51. Plamena Zlateva, Sliding mode control of wastewater treatment process with activated sludge under extreme weather events. 6th International Conference on Advances in Environment Research (ICAER 2020), 26-28, August 2020 Sapporo, Japan.
52. Ivanov P., N. Dobrev, B. Berov, M. Krastanov & R. Nankin. 2020. Assessment of Landslide Hazard in Bulgaria using GIS. 8th International Conference on Cartography & GIS. Nessebar, Bulgaria
53. Zlateva, I., Dzhembekova, N., Rubino, F., Slabakova, N., Slabakova, V., Moncheva, S. Spatial distribution of cyst morphotypes of Scrippsiella acuminata complex in the Black Sea surface sediments in relation to environmental factors. Fifteenth International Conference On Marine Sciences And Technologies Black Sea 2020, 28th October 2020, Varna, Bulgaria
54. Slabakova, V., Moncheva, S., Slabakova, N., Dzhembekova, N (2020). Evaluation of Sentinel-3A Ocean Color products in the Western Black Sea, Proc. of 1st Int. Conf. on Environmental protection and disaster EnviroRISKs, 29 – 30 September 2020.
55. Slabakova, V., Zlateva I., Slavova, K. (2020) Initial assessment of composition, abundance, spatial distribution and hotspots identification of floating macro litter in the Bulgarian Black Sea waters, Proc. of 1st Int. Conf. on Environmental protection and disaster EnviroRISKs, 29-30 September 2020.
56. Bojilova, R., & Mukhtarov, P. (2020). Methodology for Calculating the Parameters of Radio Paths with Ionospheric Reflection. Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 241-248. https://doi.org/10.48365/ENVR-2020.1.22
57. Raykova, P., Solakov, D., & Simeonova, S. (2020). Seismological Analysis of the 2006 Kardzhali Earthquake. Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 319-330. https://doi.org/10.48365/ENVR-2020.1.29
58. Trifonova, P., Solakov, D., Simeonova, S., Metodiev, M., & Balan, S. F. (2020). Parameters of the Seismic Risk for Blagoevgrad Region, Bulgaria. Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 353-360. https://doi.org/10.48365/ENVR-2020.1.32
59. Krastanov, M. (2020). Assessment of Destabilizing Factors on a Potential Landslide Slope in Sofia Kettle –Example from the German Village Area, Bulgaria. Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 420-431. https://doi.org/10.48365/ENVR-2020.1.38
60. Dragomirov, D., Oynakov, E., Buchakchiev, V., & Milkov, J. (2020). Seismicity on the Territory of Bulgaria and Surroundings Recorded by NOTSSI for the Period 2017-2019. Proceeding of 1st International Conference on Environmental Protection and Disaster RISKs, 2020, p. 519-524. https://doi.org/10.48365/ENVR-2020.1.47
61. Barantiev, D., E. Batchvarova, H. Kirova, O. Gueorguiev (2020) PBL Vertical Structure During Extreme Wind Events at Seaside Region of Southern Bulgaria, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part Two, 480-490, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.43
62. Chervenkov, H., V. Ivanov, G. Gadzhev, K. Ganev (2020) Assessment of the Future Climate over Southeast Europe Based on CMIP5 Ensemble of Climate Indices – Part One: Concept and Methods, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part One, 144-156, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.13
63. Chervenkov, H., V. Ivanov, G. Gadzhev, K. Ganev (2020) Assessment of the Future Climate over Southeast Europe Based on CMIP5 Ensemble of Climate Indices – Part Two: Results and Discussion, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part One, 157-169, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.14
64. Galabov, V. (2020) The Western Black Sea Waves 1980-2020 – Study Based on ERA5 Storm Surges Affecting the Bulgarian Coast – Study Based on 41 Years Numerical Hindcast, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part Two, 302-310, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.27
65. Galabov, V. (2020) Storm Surges Affecting the Bulgarian Coast – Study Based on 41 Years Numerical Hindcast, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part Two, 311-318, https://doi.org/10.48365/envr-2020.1.28
66. Georgieva, E., E. Hristova, B. Veleva (2020) Effect of Saharan Dust Intrusions on Precipitation Chemistry in Bulgaria, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part Two, 467-479, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.42
67. Hristova, E., B. Veleva, K. Velchev, E. Georgieva (2020) Cloud and Rain Water Chemical Composition at Peak Cherni Vrah, Bulgaria Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part One, 112-122, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.10
68. Kirova, H., N. Neykova, E. Georgieva (2020) How Well Do the Air Quality Models EMEP and CAMS Reproduce Particulate Matter Surface Concentrations in Bulgaria, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part One, 101-111, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.9
69. Malcheva, K., T. Marinova, L. Bocheva (2020) Statistical Assessment of Annual Maximum Daily Precipitation over Bulgaria in the Period 1892-2018, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part Two, 452-466, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.41
70. Neykova, R., E. Hristova (2020) Application of Backward Trajectories and Cluster Analysеs for Study of Variations in PM10 Concentrations, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part One, 170-178, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.15
71. Savov, P., N. Kolev, E. Batchvarova, H. Kirova, M. Kolarova (2020) Particulate Matter Characteristics and Atmospheric Boundary Layer Height over Sofia, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part One, 65-78, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8,
72. https://doi.org/10.48365/envr-2020.1.6
73. Syrakov, D., M. Prodanova, E. Georgieva (2020) Satellite Data Assimilation of Air Quality Parameters in Bulgaria, Proceeding of 1st International conference on Environmental protection and disaster RISKs, Part One, 44-52, ISBN 978-619-7065-38-1, е-ISBN 978-619-7065-39-8, https://doi.org/10.48365/envr-2020.1.4

74. Nikolov H., Atanasova M. Using Information Obtained from Sar Data to Assess Flood Affected Areas in the Area of Bregovo, Bulgaria. Proceedings FIG e-Working Week 2021 Smart Surveyors for Land and Water Management – Challenges in a New Reality Virtual, 21–25 June 2021, FIGNET, 2021, ISBN:978-87-92853-93-6, ISSN:2307-4086,
75. Atanasova M., Nikolov H., Oynakov E. CO-SEISMIC SURFACE DISPLACEMENTS AFTER THE EARTHQUAKES IN LARISSA, 3 MARCH 2021, DERIVED BY DINSAR. Proceedings of 21th International Multidisciplinary Scientific GeoConference SGEM 2021, International Multidisciplinary Scientific Geoconference, приета за печат: 2021, SJR (Scopus):0.232
76. Dimitrov N., I. Georgiev, P. Danchev. VELOCITY FIELD IN SOUTHWEST BULGARIA OBTAINED FROM GNSS DATA. Proceedings of 21th International Multidisciplinary Scientific GeoConference SGEM 2021, International Multidisciplinary Scientific GeoConference, приета за печат: 2021, SJR (Scopus):0.217. in print.
77. Dimitrov N., P. Danchev, I. Georgiev. Refraction Correction for Connection of the National Leveling Network First Order to Tide Gauge Station Varna. Conference Proceedings, 11th Congress of the Balkan Geophysical Society, Volume 2021, European Association of Geoscientists & Engineers, 2021, DOI:10.3997/2214-4609.202149BGS29, 1-5. SJR (Scopus):0.11.
78. Danchev, P, Ivanov, A. Current state of geodetic investigations on contemporary crustal movements in the region of Sofia. Conference Proceedings, 11th Congress of the Balkan Geophysical Society, Oct 2021, Volume 2021,, European Association of Geoscientists & Engineers, 2021, DOI:10.3997/2214-4609.202149BGS30, 1-5. SJR (Scopus):0.11.
79. Maria Temelkova. The development of hydro energy in Bulgaria after 1989, Proceedings of 21th International Multidisciplinary Scientific GeoConference SGEM 2021, приета за печат: 2021, SJR (Scopus):0.232.
80. Emil Oynakov, Dimcho Solakov, Irena Aleksandrova. ASSESSMENT OF STATION CORRECTIONS (SITE-EFFECT) FOR SEISMIC STATIONS FROM THE BULGARIAN SEISMIC NETWORK CALCULATED ON THE BASIS OF LOCAL AND REGIONAL EARTHQUAKES. Proceedings of 21th International Multidisciplinary Scientific GeoConference SGEM 2021, приета за печат: 2021, SJR (Scopus):0.232.
81. Oynakov, E, D. Solakov, I. Aleksandrova. Study of the Seasonal Changes of the Amplitude-frequency Characteristics of the Microseismic Noise. Conference Proceedings, 11th Congress of the Balkan Geophysical Society, 2021, European Association of Geoscientists & Engineers, 2021, DOI:https://doi.org/10.3997/2214-4609.202149BGS4, 1-5.
82. Irena Aleksandrova, Dimcho Solakov, Emil Oynakov. COMPARISON OF NOTSSI NETWORK STATIONS’ CORRECTIONS, AFTER ANALYSIS OF THE SEISMIC NOISE AND EARTHQUAKES, USING THE METHOD FOR CALCULATING THE RATIO OF THE AMPLITUDE SPECTRUES OF H-V SIGNAL COMPONENTS. Proceedings of 21th International Multidisciplinary Scientific GeoConference SGEM 2021, International Multidisciplinary Scientific Geoconference, приета за печат: 2021, SJR (Scopus):0.232.
83. Popova, M., E. Oynakov, D. Solakov, I. Aleksandrova, D. Dragomirov, R. Ivanov. Experimental Evaluation of the Dynamical Parameters f0 and A0 Using the Method HVSR. Conference Proceedings, 11th Congress of the Balkan Geophysical Society, 2021, European Association of Geoscientists & Engineers, 2021, DOI:https://doi.org/10.3997/2214-4609.202149BGS25, 1-5.
84. Oynakov, E., D. Solakov, I. Aleksandrova, M. Popova, D. Dragomirov. 3D Modeling of Water-saturated Layers by Using the HVSR Method of Poisson. Conference Proceedings, 11th Congress of the Balkan Geophysical Society, 2021, European Association of Geoscientists & Engineers, 2021, DOI:https://doi.org/10.3997/2214-4609.202149BGS18, 1-5.
85. Mariya Popova, Dragomir Dragomirov, Assist. Prof. Dr Emil Oynakov, Valentin Buchakchiev, Yordan Milkov, Petar Kirilov, Radko Valkov, Tihomir Iliev. SEISMICITY IN BULGARIA AND SURROUNDINGS IN THE FIRST 20 YEARS OF THE TWENTY-FIRST CENTURY
86. Petya Trifonova, Liliya Dimitrova, Metodi Metodiev, Maria Chamati, Plamena Raykova. EARTHQUAKE EFFECTS RECORDED ON MAGNETOGRAM – WHERE, WHEN AND WHY. 21th International Multidisciplinary Scientific GeoConference SGEM 2021, приета за печат: 2021, SJR (Scopus):0.232
87. M.Chamati. ULF geomagnetic observation at Panagjuriste, Bulgaria as a tool for investigation of the magnetosphere-ionosphere-lithosphere system. Bulgarian Geophysical Journal, 43, 2021, ISSN:2683-1317, DOI:10.34975/bgj-2020.43.8, 89-97
88. Rumiana Bojilova, Plamen Mukhtarov. Forecasting the Propagation of HF Radio Waves Over Bulgaria. Environmental Protection and Disaster Risks. EnviroRISK 2020. Studies in Systems, Decision and Control, vol 361, Springer, Cham, 2021, ISSN:2198-4182; E-ISSN:2198-4190, DOI: https://doi.org/10.1007/978-3-030-70190-1_21, 309-324.
89. Rumiana Bojilova, Plamen Mukhtarov. AN EMPIRICAL MODEL FOR FORECASTING THE CRITICAL FREQUENCY OF THE IONOSPHERIC E-REGION OVER BULGARIA. SGEM CONFERENCE PROCEEDINGS 2021, приета за печат: 2021, ISSN:1314-2704.
90. Borislav Andonov, Maria Chamati. LOCAL SPECTRAL CHARACTHERISTICS OF ULTRA LOW FREQUENCY GEOMAGNETIC VARIATIONS WITH MODERATE GEOMAGNETIC ACTIVITY CONDITIONS AT MID LATITUDES. 21th International Multidisciplinary Scientific GeoConference SGEM 2021, приета за печат: 2021, SJR (Scopus):0.232 Q4 (Scopus)
91. Maria Chamati, Borislav Andonov. ULTRA-LOW FREQUENCY GEOMAGNETIC PULSATIONS OBSERVED AT MID LATITUDES IN PANAGJURISTE, BULGARIA. 21th International Multidisciplinary Scientific GeoConference SGEM 2021, приета за печат: 2021, SJR (Scopus):0.232 Q4 (Scopus)
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98. Stefanov, D., D. Solakov, J. Milkov, 2021. Seismic risk for the city of Blagoevgrad. XXI International Multidisciplinary Scientific GeoConference Surveying, Geology and Mining, Ecology and Management – SGEM 2021
99. Solakov, D., S. Simeonova, P. Raykova. Earthquake Scenario for the City of Veliko Tarnovo. Conference Proceedings, 11th Congress of the Balkan Geophysical Society, 2021, European Association of Geoscientists & Engineers, 2021
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101. Dobrev N, Berov B, Ivanov P, Frantzova A. 2021. Distribution of landslides in the area of the town of Polski Trambesh, Northern Bulgaria. Сп. БГД, 82, 3. ISSN:0007-3938, DOI: https://doi.org/10.52215/rev.bgs.2021.82.3.213, 213-215. JCR-IF (Web of Science):0.21
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