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

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.

P.  Hlavá?, Bekchiev, R., R??i?ka, J., and Lackner, T., ?Contribution to the knowledge of myrmecophilous beetles (Coleoptera) of Bulgaria.?, Acta Societatis Zoologicae Bohemicae, vol. 71 , pp. 131-136, 2007.