Ruzhentsev, V.Ye. (1928). Podrazdeleniye apsheronskogo yarusa v svyazi s izucheniyem apsheronskikh otlozheniy khrebta Malogo Kharami [Subdivision of the Apsheronian stage in connection with the study of the Apsheronian rocks in the Maly-Kharamy range]. Byulleten' Moskovskogo Obshchestva Ispytateley Prirody, novaya seriya. Otdel geologicheskiy. 6(3-4): 241-266.
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Ruzhentsev, V.Ye.
1928
Podrazdeleniye apsheronskogo yarusa v svyazi s izucheniyem apsheronskikh otlozheniy khrebta Malogo Kharami [Subdivision of the Apsheronian stage in connection with the study of the Apsheronian rocks in the Maly-Kharamy range]