	Authors	Year	Title
	Becker, House & Menner	2000	Revision of ammonoid biostratigraphy in the Frasnian (Upper Devonian) of the Southern Timan (Northeast Russian Platform). [R.T.Becker,M.R.House,V.V.Menner & N.S.Ovnatanova]. Acta Geologica Polonica, 50: 67-97, 10 text-figs., 3 tabls., 4 pls., Warszawa.
	Bogoslovsky	1969	Devonskie ammonoidei. I. Agoniatity. Trudy paleont. Inst., 124: 1-341, fig.1-104, pl.1-29; Moskva.
	Korn & Klug	2002	Ammoneae Devonicae. In: Fossilium Catalogus, I: Animalia (edit. Riegraf,W.), Pars 138: 375 p., 238 fig., 4 tab., Leiden (Backhuys Publ.).