Evitt et al., 1998
From dinoflaj2
Evitt, W.R., Damassa, S.P. and Albert, N.R., 1998: A tiger by the tail: the exophragm of the Cretaceous-Paleocene dinoflagellate Palaeoperidinium and is implications. Palynology, v.22, p.1-55, pl.1-18.
