CALLOMON, J. H.; ALSEN, P.; SURLYK, F. . The ammonites of the Middle Jurassic Cranocephalites beds of East Greenland. GEUS Bulletin, Copenhagen, Denmark, v. 34, p. 1–86, 2015. DOI: 10.34194/geusb.v34.4488. Disponível em: https://geusbulletin.org/index.php/geusb/article/view/4488. Acesso em: 25 may. 2022.