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 fuer Geologie und Palaeontologie Abhandlungen, 298(2), Nov 2020: 203-233. 210 [Zoological Record Volume 157]