	Authors	Year	Title
	Korn	1988b	Goniatites from the Gattendorfia Stufe of Hoppecke (Lower Carboniferous, Northeastern Rhenish Massif). Courier Forschungsinstitut Senckenberg, 100: 217-218, fig.1; Frankfurt a.M.
	Korn & Feist	2007	Early Carboniferous ammonoid faunas and stratigraphy of the Montagne Noire (France). Fossil Record 10 (2) (2007): 99-124, 20 fig.