Lentin and Vozzhennikova, 1990
From dinoflaj2
Lentin, J.K. and Vozzhennikova, T.F., 1990: Fossil dinoflagellates from the Jurassic, Cretaceous and Paleogene deposits of the USSR - a re-study. American Association of Stratigraphic Palynologists, Contributions Series, no.23, 221 p., pl.1-16.