R.  Bekchiev and Kostova, R., ?The Subfamily Pselaphinae (Coleoptera: Staphylinidae) of South-western Bulgaria: Rila and Pirin Mountains?, Acta Zoologica Bulgarica, vol. 74, pp. 169-174, 2022.

R.  Kostova, Lazarov, S., Bekchiev, R., Goranov, S., Simov, N., and Beshkov, S., Soil and cave invertebrates from the village Gintsi area. Sofia: Association of Speleoclubs in Sofia, 2016, p. 116.

R.  Bekchiev, ?Faunistical research on Pselaphinae fauna (Coleoptera: Staphylinidae) in several regions of south-west Bulgaria?, Sofia University 'St. Climent Ohridski", Sofia, 2007.

M.  Schulke and Smetana, A., Catalogue of Palaearctic Coleoptera - Pselaphinae, vol. 2.1. Brill Books, 2015.

R.  Bekchiev, ?A study of the Pselaphinae (Coleoptera, Staphylinidae) in the Rhodope Mountains (Bulgaria)?, in Biodiversity of Bulgaria 4. Biodiversity of Western Rhodopes (Bulgaria and Greece) II., P.  Beron, Ed. Sofia: Pensoft Publishers & National Museum of Natural History, Bulgarian Academy of Sciences, 2011, p. 267?278.

R.  Bekchiev and Shishiniova, M., ?A contribution to the Pselaphinae fauna (Coleoptera: Staphylinidae) of the Vitosha Mountain?, Acta Zoologica Bulgarica, vol. 59, pp. 33-39, 2007.

R.  Bekchiev, ?The subfamily Pselaphinae (Coleoptera: Staphylinidae) of southwestern Bulgaria. I.?, Historia Naturalis Bulgarica, vol. 19, pp. 51-71, 2008.