| On the potential of small benthic foraminifera as paleoecological indicators: recent advances B Valchev Ann. UMG 46, 51-56, 2003 | 57 | 2003 |
| Paleogene hyaline benthic foraminifera (LAGENINA and ROTALIINA) from the Republic of Macedonia B Valchev, V Stojanova, S Juranov Review of the Bulgarian Geological Society 74 (1-3), 81-110, 2013 | 24 | 2013 |
| Paleogene planktic foraminifera of the Republic of Macedonia V Stojanova, B Valchev, S Juranov Comptes rendus de l’Academie bulgare des Sciences 66 (5), 717-724, 2013 | 22 | 2013 |
| Attempt for Upper Cretaceous planktic foraminiferal zonation of the Srednogorie and Eastern Balkan zones (Bulgaria) E Dimitrova, B Valchev Geologica Balcanica 36 (1/2), 55, 2007 | 22 | 2007 |
| Cretaceous/Tertiary boundary in the Carpathian type Upper Cretaceous near the village of Kladorub, Vidin District D Sinnyovsky, B Valchev, D Sinnyovska Ann. UMG “St. Iv. Rilski 45, 1-5, 2002 | 13 | 2002 |
| New findings of Paleogene agglutinated and porcelaneous foraminifera from the Republic of Macedonia B Valchev, V Stojanova, S Juranov Comptes rendus de l’Académie bulgare des Sciences 66 (7), 1033-1042, 2013 | 9 | 2013 |
| 3D lithostratigraphic model of the Paleogene of the onshore part of the Moesian Platform (Northeast Bulgaria) B Valchev, D Sachkov, S Juranov Geologica Balcanica 47 (1), 23-36, 2018 | 7 | 2018 |
| Benthic foraminiferal morphogroups from the Paleocene of the coastal part of East Stara Planina Mts B Valchev Geologica Balcanica 35 (3/4), 41, 2005 | 7 | 2005 |
| Midway-type benthic foraminifera from the Paleocene of the coastal part of East Stara Planina (Eastern Bulgaria). Family TEXTULARIIDAE Ehrenberg, 1838 to family … B Valchev Ann. Univ. of Mining and Geol 50, 129-137, 2007 | 6 | 2007 |
| Biostratigraphy of the Paleocene of the coastal part of East Stara Planina based on small benthic foraminifera B Valchev GEOLOGICA BALCANICA 33, 47-60, 2003 | 6 | 2003 |
| Paleogene lithostratigraphy in the Varna Plateau (Northeastern Bulgaria): a new view based on 3D modeling B Valchev, D Sachkov, S Juranov Rev. Bulg. Geol. Soc 80 (1), 41-53, 2019 | 5 | 2019 |
| New Data about the Dvoynitsa Formation Distribution in the Onshore Part of the Dolna Kamchiya Basin (Eastern Bulgaria) on the Base of 3D Lithological Modelling B Valchev, H Dimitrov, D Sachkov, S Juranov Comptes rendus de l’Académie bulgare des Sciences 71 (12), 1252-1256, 2018 | 5 | 2018 |
| Sand dunes along the Bulgarian Black Sea Coast south of the town of Burgas-statute and geoconservation value. B Valchev Review of the Bulgarian Geological Society 76 (1), 2015 | 5 | 2015 |
| A new concept for the Paleogene lithostratigraphy in the onshore part of the Dolna Kamchiya Basin (eastern Bulgaria) on the basis of 3D modeling B Valchev, H Dimitrov, D Sachkov, S Juranov Geologica Balc 49 (2), 59-73, 2020 | 4 | 2020 |
| New data on the Paleogene lithostratigraphic units’ distribution in the Avren Step south of Varna and Beloslav Lakes based on borehole data and seismic profiles’ interpretation B Valchev, H Dimitrov Rev. Bulg. Geol. Soc 81 (1), 55-67, 2020 | 4 | 2020 |
| The foraminiferal analysis as a method for determination of source material for the sherds from the “Ada tepe” archaeological site, Kroumovgrad district (Eastern Rhodopes) G Ajdanlijsky, B Valchev, G Nehrizov, D Zlatanov Geoarchaeology and Archaeomineralogy. Proceedings of the International …, 2008 | 4 | 2008 |
| Two types of Paleocene benthic foraminiferal assemblages from the coastal part of east Stara Planina B Valchev Comptes Rendus de l'Academie Bulgare des Sciences, vol. 56, p. 3: 43 56 (3 …, 2003 | 4 | 2003 |
| Lithostratigraphic interpretation of seismic profiles on the example of the Paleogene in the onshore part of the Dolna Kamchiya Basin (Eastern Bulgaria) Литостратиграфска … Б Вълчев, Х Димитров REVIEW OF THE BULGARIAN GEOLOGICAL SOCIETY 79 (part 3), 105-106, 2018 | 3 | 2018 |
| Benthic foraminiferal morphogroups from the Paleogene of the Republic of Macedonia–characterization and paleoecological significance B Valchev, V Stojanova Review of the Bulgarian Geological Society 77 (2-3), 3-21, 2016 | 3 | 2016 |
| Геотопите” Устието на река Велека” и” Силистар”–основа на един естествен геопарк по палеовулканология В Желев, Б Вълчев, К Кършева, Д Съчков Год. МГУ 55 (1), 2012 | 3 | 2012 |
Violeta StojanovaProfessor of Natural and Tehnical Sciences, University "Goce Delcev" StipVerified email at ugd.edu.mk
