[1]
A. Blanco-Piñón, L. M. Garibay-Romero, and J. Alvarado-Ortega, “The oldest stratigraphic record of the Late Cretaceous shark Ptychodus mortoni Agassiz, from Vallecillo, Nuevo León, northeastern Mexico”, revmexcg, vol. 24, no. 1, pp. 25–30, Feb. 2018.