@article {11798,
	title = {Bestimmungstabelle der mitteleurop{\"a}ischen Arten der Gattung Ptomaphagus Illiger},
	journal = {Koleopterologische Zeitung},
	volume = {1},
	number = {1},
	year = {1949},
	pages = {13-14.},
	author = {Sokolowski, K.}
}
@article {11708,
	title = {Die mitteleurop{\"a}ischen Ptomaphagus Arten (Col.) (Catopidenstudien V)},
	journal = {EBls},
	volume = {52},
	year = {1956},
	pages = {176-181.},
	author = {Sokolowski, K.}
}
