1. A. S. Alifirov and A. E. Igol’nikov, “New Records of Volgian and Berriasian Ammonites from the Yanov Stan Formation of Northwestern Siberia,” in Jurassic System of Russia: Problems of Stratigraphy, and Paleogeography (Izd. Yaroslavl’sk. Gos. Politekh. Univ., Yaroslavl, 2007a), pp. 7–9 [in Russian].
2. A. S. Alifirov and A. E. Igol’nikov, “The First Record of Craspedites Pavlow (Ammonites) in the Middle Volgian Substage of the Yanov Stan Formation of Western Siberia,” in Proceedings of the Scientific Conference “Trofimukovskie chteniya-2007,” October 8–14, 2007 (Inst. Petrol. Geol. Geofiz. im. A.A. Trofimuka Sib. Otd. Ross. Akad. Nauk, Novosibirsk, 2007b), pp. 95–97 [in Russian].
3. Atlas of Mollusks and Foraminiferans of the Marine Deposits of the Upper Jurassic and Neocomian of the Western Siberian Oil and Gas Field (Nedra, Moscow, 1990), Vol. 1 [in Russian].
4. Bazhenovo Horizon in Western Siberia (Nauka, Novosibirsk, 1986) [in Russian].
5. P. A. Gerasimov, The Upper Substage of the Volgian Stage of the Central Part of the Russian Platform (Nauka, Moscow, 1969) [in Russian].