Bonanno, Salvio, and Giuseppe Sirna. “Revision of Some Species of Cenomanian Caprinid Rudists Instituted by G. G. Gemmellaro in 1865”. Revista Mexicana de Ciencias Geológicas 12, no. 2 (February 6, 2019): 135–144. Accessed May 18, 2025. https://www.rmcg.unam.mx/index.php/rmcg/article/view/1172.