1. Carboniferous and Permian stratigraphy, northern Yukon Territory, Canada;Bamber;Bull. Can. Pet. Geol.,1971
2. Die Lagerstätten fester mineralischer Rohstoffe in den neuen Bundesländern;Baumann;Glückauf Forschungsh.,1991
3. Field excursion guidebook for the Carboniferous sections of the Moscow Basin;Belskaya,1975
4. Fossil assemblages and depositional environments: Limits to stratigraphical correlations;Bless,1987