| Conspectus of the Bulgarian vascular flora: Distribution maps and floristic elements B Assyov, A Petrova, D Dimitrov, R Vassilev Bulgarian Biodiversity Foundation, Sofia, 2006 | 480* | 2006 |
| Conspectus of the Bulgarian vascular flora: Distribution maps and floristic elements B Assyov, A Petrova, D Dimitrov, R Vassilev Bulgarian Biodiversity Foundation, Sofia, 2012 | 477* | 2012 |
| Conspectus of the Bulgarian vascular flora. Distribution maps and floristic elements B Assyov, D Dimitrov, R Vassilev, A Petrova Bulgarian-Swiss Biodiversity Programme, Sofia, 2002 | 475 | 2002 |
| Conspectus of the Bulgarian vascular flora. Distribution maps and floristic elements B Assyov, D Dimitrov, R Vassilev Bulgarian-Swiss Biodiversity Programme, Sofia, 2001 | 475 | 2001 |
| Red List of fungi in Bulgaria MM Gyosheva, CM Denchev, EG Dimitrova, B Assyov, RD Petrova, ... Mycologia Balcanica 3 (1), 81-87, 2006 | 117 | 2006 |
| Checklist of the larger basidiomycetes in Bulgaria CM Denchev, B Assyov Mycotaxon 111 (1), 279-282, 2010 | 83 | 2010 |
| Considerations and consequences of allowing DNA sequence data as types of fungal taxa JC Zamora, M Svensson, R Kirschner, I Olariaga, S Ryman, LA Parra, ... IMA fungus 9, 167-175, 2018 | 80 | 2018 |
| Preliminary checklist of Boletales s. str. in Bulgaria B Assyov, CM Denchev Mycologia Balcanica 1 (2), 195-208, 2004 | 21 | 2004 |
| New records and noteworthy data of plants, algae and fungi in SE Europe and adjacent regions, 3 MS Sabovljevic, G Tomovic, P Boycheva, D Ivanov, TT Denchev, ... Botanica Serbica 45 (1), 119-127, 2021 | 20* | 2021 |
| New data on hypogeous fungi from Greece with special reference to Wakefieldia macrospora (Hymenogastraceae, Agaricales) and Geopora clausa (Pyronemataceae, Pezizales) V Kaounas, B Assyov, P Alvarado Mycologia Balcanica 8, 105-113, 2011 | 20 | 2011 |
| Present status and future of boletoid fungi (Boletaceae) on the island of Cyprus: Cryptic and threatened diversity unravelled by ten-year study M Loizides, JM Bellanger, B Assyov, PA Moreau, F Richard Fungal Ecology 41, 65-81, 2019 | 19 | 2019 |
| National action plan for conservation of wetlands of high significance in Bulgaria, 2013–2022 V Vassilev, R Vassilev, P Yankov, N Kamburova, Y Uzunov, L Pehlivanov, ... Sofia: Bulgarian Biodiversity Foundation, 2013 | 19 | 2013 |
| Diversity of Chroogomphus (Gomphidiaceae, Boletales) in Europe, and typification of C. rutilus R Scambler, T Niskanen, B Assyov, AM Ainsworth, JM Bellanger, ... IMA fungus 9, 271-290, 2018 | 18 | 2018 |
| Revision of Boletus section Appendiculati (Boletaceae) in Bulgaria with a key to the Balkan species B Assyov Turkish Journal of Botany 36, 408-419, 2012 | 18 | 2012 |
| Molecular phylogenetic studies of Turkish boletes with emphasis on some recently described species. F Bozok, B Assyov, H Taşkın, HH Doğan, S Büyükalaca | 17 | 2020 |
| Important Plant Areas in Bulgaria B Assyov Pensoft Publishers, Sofia, 2012 | 17* | 2012 |
| New records of some rare and noteworthy larger fungi from Bulgaria B Assyov, D Stoykov, S Nikolova Trakia Journal of Sciences 8 (4), 1-6, 2010 | 17 | 2010 |
| New records and noteworthy data of plants, algae and fungi in SE Europe and adjacent regions, 6 G Tomović, MS Sabovljević, E Mašić, S Popović, A Marković, I Trbojević, ... Botanica Serbica 45 (2), 361-368, 2021 | 14 | 2021 |
| Hydnellum dianthifolium sp. nov. Basidiomycota, Thelephorales, a new tooth-fungus from southern Europe with notes on H. concrescens and H. scrobiculatum. M Loizides, P Alvarado, B Assyov, EEF Arnolds, PA Moreau Phytotax 280 (1), 23-35, 2016 | 14 | 2016 |
| Euphorbia prostrata – a new alien species to the Bulgarian flora V Vladimirov, P A.S., B Assyov Comptes rendus de l’Acad´emie bulgare des Sciences 67 (4), 527-532, 2014 | 14 | 2014 |
