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References
- ↑ Reviziya semeystva Dimorphoceratidae. VE Ruzhencev, MF Bogoslovskaya, Paleontologicheskiy Zhurnal, 1969
- ↑ V. E. Ruzhentsev and M. F. Bogoslovskaya. 1978. Namyurskii etap v evolyutsii ammonoidyey - Namurian stage, evolution of ammonoids. Trudyi paleontologicheskovo instituta 167:1-338
- ↑ "Fossilworks: Cancelloceras". fossilworks.org. Retrieved 17 December 2021.
