Naumova, 1950
From dinoflaj3
Naumova, S.N., 1950: Spory nizhnego silura. Trudy Konferentsii po Sporovo-Pyltsevomu Analizu, 1948 Goda, p. 165-190; Geograficheskii Facultet, Izdatelstvo Moskovskogo Universiteta, Moscow, Russia.