Damassa, Sarah Pierce; Williams, Graham L. (1996): Species diversity patterns in North Atlantic Eocene-Oligocene dinoflagellates. University of Wales, Aberystwyth-Press, Aberystwyth, United Kingdom, In: Moguilevsky, Alicia (editor), Whatley, Robin (editor), Microfossils and oceanic environments, 187-203, georefid:1997-074809