K.-A. Tröger and W. K. Christensen, “Upper Cretaceous (Cenomanian-Santonian) inoceramid bivalve faunas from the island of Bornholm, Denmark. With a review of the Cenomanian-Santonian lithostratigraphic formations and locality details”, seriea, vol. 28, pp. 1–47, Jun. 1991.