1. Marine Unterkreide (Boreal und Tethys);Bartenstein,1962
2. Aptian to Cenomanian dinoflagellate cysts from the Mazagan Plateau, northwest Africa;Below,1984
3. The Cretaceous of North Greenland—a stratigraphic and biogeographical analysis;Birkelund;Zitteliana,1983
4. Taxonomy of Upper Jurassic-Lower Cretaceous microplankton from the Richardson Mountains, District of Mackenzie, Canada;Brideaux;Geological Survey of Canada, Bulletin,1977
5. Miospores and microplankton from Aptian-Albian rocks along Horton River, District of Mackenzie;Brideaux;Geological Survey of Canada, Bulletin,1975