@mastersthesis {1100,
	title = {Faunistical research on Pselaphinae fauna (Coleoptera: Staphylinidae) in several regions of south-west Bulgaria},
	volume = {PhD},
	year = {2007},
	pages = {131},
	school = {Sofia University {\textquoteright}St. Climent Ohridski"},
	address = {Sofia},
	author = {Bekchiev, R.}
}
@article {799,
	title = {First purposive study of beetles (Coleoptera) from endogean environments in Bulgaria: collection sites and preliminary results},
	journal = {Biodiversity JournalBiodiversity Journal},
	volume = {6},
	number = {1},
	year = {2015},
	pages = {327{\textendash}340},
	author = {Bekchiev, R. and Gu{\'e}orguiev, B.}
}
