Watkins, David K.; Crux, Jason A.; Pospichal, James J.; Wise, Sherwood W., Jr. (1991): Upper Cretaceous nannofossil biostratigraphy of the Southern Ocean and its palaeobiogeographic implications. International Nannoplankton Association, The Hague, International, In: Young, J. R. (editor), International Nannoplankton Association; 4th conference; abstracts, 13 (2), 72-73, georefid:2006-060702