	Authors	Year	Title
	Teichert, Kummel & Sweet	1973	Permian-Triassic strata, Kuh-e-Ali Bashi, Northwestern Iran. Bulletin of the Museum of Comparative Zoology, Harvard University, 145 (8): 359-472, 14 pls., 16 figs., Cambridge, MA.
	Tozer	1969	Xenodiscacean Ammonoids and their bearing on the discrimination of the Permo-Triassic boundary. Geological Magazine, 106 (4): 348-361, tab.1-2, pl.16; Hertford.