Reference
Carsten Helm, Immo Schülke (2003): Late Jurassic (oxfordian) coral reefs of the florigemma bank member and Hainholz member (Korallenoolith formation, Lower Saxony Basin, NW Germany) – Berichte des Institutes für Geologie und Paläontologie der Karl-Franzens-Universität Graz – 7: 33.