Arenillas, Ignacio, and José Antonio Arz. “Origin and Evolution of the Planktic Foraminiferal Family Eoglobigerinidae Blow, 1979, During the Early Danian (Paleocene)”. Revista Mexicana de Ciencias Geológicas 30, no. 1 (September 2, 2013). Accessed May 3, 2025. https://www.rmcg.unam.mx/index.php/rmcg/article/view/76.