H. F., Barron: Dinoflagellate cyst biostratigraphy and palaeoenvironments of the Upper Jurassic (Kimmeridgian to basal Portlandian) of the Helmsdale region, east Sutherland, Scotland, Chapter 9 in (Eds.), Northwest European Micropalaeontology and Palynology, Ellis Horwood., 1989.

R. J., Davey: Dinocyst stratigraphy of the latest Jurassic to Early Cretaceous of Haldager No. 1 borehole, Denmark, Geological Survey of Denmark, Series, 6, 1-57, 1982.

C., Downie: Microplankton from the Kimmeridge Clay, Geological Society of London, Quarterly Journal, 112, 413-434, 1957.

G., Dürr: Dinoflagellaten-Zysten aus dem Weissjura ∂ (Mittelkimmeridgien) der westlichen Schwäbischen Alb (Süddeutschland), Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 176, 67-80, 1987.

C., Heilmann-Clausen: Lower Cretaceous dinoflagellate biostratigraphy in the Danish Central Trough, Danmarks Geologiske Undersøgelse Series A, No17., 1987.