Basse, M.; Lemke, U. (2020). Class Trilobita in the Wocklum Limestone of the northern Rhenish Massif east of the Rhine (late Famennian, Late Devonian) – Part 1. Phillipsiidae and Proetidae. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 298(2): 203-233.
Class Trilobita in the Wocklum Limestone of the northern Rhenish Massif east of the Rhine (late Famennian, Late Devonian) – Part 1. Phillipsiidae and Proetidae
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen