Pervuninskaya,N.A. (1966)
Substantiation of stratigraphic Division of Lower Cretaceous Coal deposits of the Zhigansk Region based on spore-pollen investigations [ Obosnovanie stratigraficheckogo Rascheneniya Nikhemelovykh Uglenosnoykh otlozhenii Zhiganskogo Raioma po Dadnym sporovo-pyl'tsykh Issledovanii ] Uchenye Zapiski(Science Notes), Paleontologiya i Biostratigrafiya (NIIGA) Ministerstvo Geologii SSR
# 15 P. 41- 46