	Authors	Year	Title
	Korejwo	1986	Biostratigraphy of the Carboniferous deposits of the Swidnik blocks (Lublin Coal Basin). Acta Geologica Polonica, 36 (4): 337-346, tab.1-2, pl.1-37; Warszawa.
	Kumpera	1973	A Contribution to the Study of the Upper Viséan Fauna in Culm of Drahany Plateau and to its Stratigraphic Testimony. Sbor. ved. praci Vys. sk. ban. Ostrava, 19 (2): 143-174, pl.1-8; Ostrava.