Authors Year Title
Bockwinkel & Ebbighausen 2006 A new ammonoid fauna from the Gattendorfia-Eocanites Genozone of the Anti-Atlas (Early Carboniferous; Morocco).
Fossil Record 9 (1): 87-129, 40 fig., (Wiley) Weinheim.
Ebbighausen & Bockwinkel 2007 Tournaisian (Early Carboniferous/Mississippian) ammonoids from the Ma'der Basin (Anti-Atlas, Morocco).
Fossil Record, 10 (2) (2007): 125-163, 50 fig., Weinheim.
Korn & Weyer 2003 High resolution stratigraphy of the Devonian-Carboniferous transitional beds in the Rhenish Mountains.
Mitteilungen des Naturkunde-Museums Berlin, Geowissenschaftliche Reihe, 6: 79-124, 26 fig., 1 tab.,4 pl., Berlin.
Vöhringer 1960 Die Goniatiten der unterkarbonischen Gattendorfia-Stufe im  Hönnetal (Sauerland).
Fortschritte in der Geologie von Rheinland und Westfalen, 3,1: 107-196, fig.1-53, 1 Tab., pl.1-7; Krefeld.