Iakovleva and Heilmann-Clausen, 2010
From dinoflaj3
Iakovleva, A.I. and Heilmann-Clausen, C., 2010: Eocene dinoflagellate cyst biostratigraphy of research borehole 011-B, Omsk Region, southwestern Siberia. Palynology, v.34, p.195-232, pl.1-14.