Paull, Charles K., David W. Caress, Roberto Gwiazda, Jaime Urrutia-Fucugauchi, Mario Rebolledo-Vieyra, Even Lundsten, Krystle Anderson, and Esther J. Sumner. 2014. Cretaceous – Paleogene boundary exposed: Campeche Escarpment, Gulf of Mexico. Marine Geology 392-400.

Paull, Charles K., David W. Caress, Roberto Gwiazda, Jaime Urrutia-Fucugauchi, Mario Rebolledo-Vieyra, Even Lundsten, Krystle Anderson, and Esther J. Sumner. 2014.  Cretaceous – Paleogene boundary exposed: Campeche Escarpment, Gulf of Mexico. Marine Geology 392-400.