Stover and Helby, 1987b
From dinoflaj3
Stover, L.E. and Helby, R., 1987b: The Jurassic dinoflagellate Omatia and allied genera. In: Jell, P.A. (editor), Studies in Australian Mesozoic palynology; Memoir of the Association of Australasian Palaeontologists, no.4, p.143-157.