| New records of rare and threatened beetles (Insecta: Coleoptera) in Bulgaria R Bekchiev, B Guéorguiev, R Kostova, E Chehlarov, O Sivilov Acta zoologica bulgarica 70 (4), 501-506, 2018 | 14 | 2018 |
| The ground beetles (Coleoptera: Carabidae) of the Strandzha Mountain and adjacent coastal territories (Bulgaria and Turkey) R Kostova, B Guéorguiev Biodiversity Data Journal, 2016 | 7 | 2016 |
| Ground beetles (Coleoptera: Carabidae) in two biosphere reserves in the Rhodope Mountains, Bulgaria R Kostova Acta zoologica bulgarica 61 (2), 187-196, 2009 | 6 | 2009 |
| A pilot monitoring survey of the lesser blind mole-rat Nannospalax (superspecies leucodon)(Mammalia: Rodentia) in Bulgaria SA Zidarova, RD Kostova Acta Zoologica Bulgarica 73 (1), 107-112, 2021 | 5 | 2021 |
| Ground beetles (Coleoptera Carabidae) diversity patterns in forest habitats of high conservation value, Southern Bulgaria R Kostova Biodivers J 6, 341-352, 2015 | 5 | 2015 |
| One hundred years of solitude: rediscovery of the rare and protected beetle Rhysodes sulcatus (Fabricius, 1787)(Coleoptera: Rhysodidae) in Bulgaria R Bekchiev, L Crevecoeur, K Gielen, B Bosmans, K Smets, R Kostova Acta Zool. Bulg 72, 381-384, 2020 | 4 | 2020 |
| Coleoptera and Lepidoptera (Insecta) diversity in the central part of Sredna Gora Mountains (Bulgaria) R Kostova, R Bekchiev, S Beshkov Entomological Society of Malta, 2019 | 4 | 2019 |
| Carabus variolosus (Fabricius, 1787)(Coleoptera: Carabidae) in Bulgaria: rediscovered after 111 years R Bekchiev, M Antov, P Boyadzhiev, G Zaemdzhikova, R Kostova, ... Historia naturalis bulgarica 44 (10), 119-123, 2022 | 3 | 2022 |
| New records of myrmecophilous beetle Paussus turcicus (Coleoptera, Carabidae) in Southeastern Balkans A Lapeva-Gjonova, R Kostova, BV Guéorguiev Zoonotes 21, 1-3, 2011 | 3 | 2011 |
| A study of Carabid beetle (Coleoptera: Carabidae) communities in three types of agrocenosis M Shishiniova, R Kostova, N Kojabashev Archives of Biological Sciences (Yugoslavia) 53 (3), 2001 | 3 | 2001 |
| Pselaphinae (Coleoptera Staphylinidae) from Sicily and Calabria (Italy). Results from a short entomological expedition in April, 2015 G Sabella, R Bekchiev, R Kostova Biodiversity Journal 8 (1), 185-192, 2017 | 2 | 2017 |
| A new species of Duvalius, subg. Biharotrechus (Coleoptera: Carabidae) from Bulgaria B Guéorguiev, R Kostova Acta Zoologica Academiae Scientiarum Hungaricae 57 (4), 305-313, 2011 | 2 | 2011 |
| Food preferences of Pseudoophonus rufipes De Geer and Pseudoophonus griseus Panzer (Coleoptera: Carabidae) for seeds of weed and cultivated plants R Kostova, M Shishiniova Annuaire de ľUniversité de Sofia" St. Kliment Ohridski 96 (4), 137-142, 2004 | 2 | 2004 |
| A contribution to the study of the carabid beetle fauna (Coleoptera: Carabidae) in Winter wheat agrocoenoses near Sofia R Kostova Acta zoologica bulgarica 56 (2), 199-204, 2004 | 2 | 2004 |
| At a crossroads: Genetic lineages and dispersal routes of Morimusasper (Sulzer, 1776) sl (Coleoptera, Cerambycidae) in Bulgaria R Kostova, S Borissov, A Bobeva, R Bekchiev Biodiversity Data Journal 12, 2024 | 1 | 2024 |
| First exhaustive distribution and habitat modelling of Morimus asper (Sulzer, 1776) sensu lato (Coleoptera, Cerambycidae) in Bulgaria R Kostova, R Bekchiev, G Popgeorgiev, YV Kornilev Nature Conservation 53, 39-59, 2023 | 1 | 2023 |
| The Subfamily Pselaphinae (Coleoptera: Staphylinidae) of South-western Bulgaria: Rila and Pirin Mountains. R Bekchiev, R Kostova Acta Zoologica Bulgarica 74 (2), 2022 | 1 | 2022 |
| Distribution of Amorphocephala coronata (Germar, 1817)(Coleoptera: Brentidae) in Bulgaria R BEKCHIEV, O SIVILOV, R KOSTOVA, A LAPEVA-GJONOVA ZooNotes 104, 1-3, 2017 | 1 | 2017 |
| Surveying Open Habitats in Natura 2000 Sites in Bulgaria to Assess Food Availability for the Marbled Polecat Vormela peregusna (Güldenstädt, 1770) and Steppe Polecat Mustela … SA Zidarova, RD Kostova, AY Vlasseva Acta Zoologica Bulgarica 76 (1), 77-86, 2024 | | 2024 |
| Trechus (s. str.) “subnotatus” species group (Coleoptera: Carabidae) in Bulgaria R Kostova, R Bekchiev Zootaxa 5264 (4), 505-525, 2023 | | 2023 |
