Bujak et al., 1980b
From dinoflaj3
Bujak, J.P., Downie, C., Eaton, G.L. and Williams, G.L., 1980b: Taxonomy of some Eocene dinoflagellate cyst species from southern England. In: Bujak, J.P., Downie, C., Eaton, G.L. and Williams, G.L., Dinoflagellate Cysts and Acritarchs from the Eocene of Southern England. Special Papers in Palaeontology, 24, p.26-36, pl. 1-22.