	Authors	Year	Title
	Korn	2004	Late Famennian cephalopods from the Refrath 1 Borehole (Bergisch Gladbach-Paffrath Syncline; Ardennes-Rhenish Massif, Germany) Courier Forschungs-Institut Senckenberg: 251: 175-183, 6 fig., 1 tab., Frankfurt a.M.