Sverdlove and Habib, 1974
From dinoflaj3
Sverdlove, M.S. and Habib, D., 1974: Stratigraphy and suggested phylogeny of Deflandrea vestita (Brideaux) comb. nov. and Deflandrea echinoidea Cookson and Eisenack. Geoscience and Man, v.9, p.53-62, pl.1.