Popov, A. M.; Cocks, L. R. M.; Nikitin, I. F. (2002). Upper Ordovician brachiopods from the Anderken Formation, Kazakhstan: their ecology and systematics. Bulletin of the Natural History Museum, Geology Series. 58(1): 13-79.
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Popov, A. M.; Cocks, L. R. M.; Nikitin, I. F.
2002
Upper Ordovician brachiopods from the Anderken Formation, Kazakhstan: their ecology and systematics
Bulletin of the Natural History Museum, Geology Series