@article{ken_1994.197, title = {A revision of the ammonite faunas of the type Cenomanian, 5. Acanthoceratinae Calycoceras (Calycoceras), C. (Gentoniceras) and C. (Newboldiceras).}, author = {Kennedy, William James and Juignet, Pierre }, year = {1994}, journal = {Cretaceous Research (Elsevier) Amsterdam}, volume = {15}, number = {1}, pages = {17–57}, url = {https://doi.org/10.1006/cres.1994.1002}, doi = {10.1006/cres.1994.1002} }