	Authors	Year	Title
	Perna	1912	The Paleozoic of the Eastern slope of the Urals between the town of Verkhneuralsk i Magnitnaya Station Izvestiya Geologicheskogo Komiteta, 31(4): 111-383
	Perna	1914	Ammonei verkhnego neodevona vostochnogo sklona Urala. Trudy Geologicheskogo Komiteta, nov. ser., 99: 1-114, pl.1-4.