1.
Blanco-Piñón A, Garibay-Romero LM, Alvarado-Ortega J. The oldest stratigraphic record of the Late Cretaceous shark Ptychodus mortoni Agassiz, from Vallecillo, Nuevo León, northeastern Mexico. revmexcg [Internet]. 2018 Feb. 22 [cited 2025 May 3];24(1):25-30. Available from: https://www.rmcg.unam.mx/index.php/rmcg/article/view/754