	Authors	Year	Title
	Bogoslovsky	1971	Devonskie ammonoidei. II. Goniatity. Trudy paleont. Inst.Akad. Nauk SSSR, 127: 1-228, fig.1-67, pl.1-19; Moskva.
	Nalivkina	1936a	Verkhnedevonskie goniatitovye sloi r. Ai, Iuzhnyi Ural. Trudy TS N I G R I, 79: 1-24, pls.1-2, Leningrad, Moskva.