Reference

Herbert Summesberger, William James Kennedy (2004): More Ammonites (Puzosiinae, Pachydiscidae, Placenticeratidae, Nostoceratidae, Diplomoceratidae) from the Campanian (Late Cretaceous) of the Gschliefgraben (Ultrahelvetic Nappe; Austria) – Annalen des Naturhistorischen Museums in Wien – 106A: 167 - 211.