Rogov, M. A. (2014). Khetoceras (Craspeditidae, Ammonoidea)—A new genus from the Volgian stage of northern Middle Siberia, and parallel evolution of Late Volgian boreal ammonites. Paleontological Journal. 48(5): 457-464.
Khetoceras (Craspeditidae, Ammonoidea)—A new genus from the Volgian stage of northern Middle Siberia, and parallel evolution of Late Volgian boreal ammonites