@article {1376, title = {The Subfamily Pselaphinae (Coleoptera: Staphylinidae) of South-western Bulgaria: Rila and Pirin Mountains}, journal = {Acta Zoologica Bulgarica}, volume = {74}, number = {2}, year = {2022}, pages = {169-174}, author = {Bekchiev, R. and Kostova, R.} } @article {1366, title = {Coleoptera and Lepidoptera (Insecta) diversity in the central part of Sredna Gora Mountains (Bulgaria)}, journal = {Bulletin of the Entomological Society of MaltaBulletin of the Entomological Society of Malta}, volume = {10}, year = {2019}, pages = {75-95}, author = {Kostova, R. and Bekchiev, R. and Beshkov, S.} } @book {1101, title = {Soil and cave invertebrates from the village Gintsi area}, series = {Speleological Studies of Caves in Godech Municipality}, year = {2016}, pages = {116}, publisher = {Association of Speleoclubs in Sofia}, organization = {Association of Speleoclubs in Sofia}, chapter = {39-51}, address = {Sofia}, isbn = {ISBN 978-619-90659-1-4}, author = {Kostova, R. and Lazarov, S. and Bekchiev, R. and Goranov, S. and Simov, N. and Beshkov, S.}, editor = {Toshkova, V. and Tachev, I.} }