	Authors	Year	Title
	Korn	1992	Heterochrony in the evolution of Late Devonian Ammonoids. Acta Paleontologica Polonica, 37: 21-36, fig.1-6, tab.1-3; Warszawa.
	Korn & Klug	2002	Ammoneae Devonicae. In: Fossilium Catalogus, I: Animalia (edit. Riegraf,W.), Pars 138: 375 p., 238 fig., 4 tab., Leiden (Backhuys Publ.).