Quattrocchio and Sarjeant, 1996
From dinoflaj3
Quattrocchio, M.E. and Sarjeant, W.A.S., 1996: Early Palaeogene (Danian) dinoflagellates from the Colorado Basin, Argentina. Revista española de micropaleontología, v.28, no.3, p.111-138 [al. 3-411 - 3-438], pl.1-5.