	Authors	Year	Title
	Leven, Leonova & Dmitriev	1992	Perm' Darvaz-Zaalaiskoi zony Pamira: fuzulinidy, ammonoidei, stratigrafiya. Trudy Paleontologicheskogo Instituta Rossiyskaya Akademiya Nauk: 253: 1-203, 46 figs., 5 tabls., 32 pls., Moskva.