Rincon, D. A., Arenas, J. E., Cuartas, C. H., Cardenas, A. L., Molinares, C. E., Caicedo, C., and Jaramillo, C. 2007. "
Eocene-Pliocene planktonic foraminifera biostratigraphy from the continental margin of the southwest Caribbean."
Stratigraphy, 4, (4) 261–311.