Buitrón-Sánchez, Blanca Estela, and Jerjes Pantoja-Alor. “Early Cretaceous Mollusk-Perforating Sponges from Central-Western Region of Mexico”. Revista Mexicana De Ciencias Geológicas, vol. 11, no. 2, Feb. 2019, pp. 222-31, https://www.rmcg.unam.mx/index.php/rmcg/article/view/1186.