Palynology of the Eocene Esmeraldas Formation, Middle Magdalena Valley Basin, ColombiaDOI: info:10.1080/01916122.2012.650548v. 36No. 196–111
Rodríguez-Forero, Guillermo, Oboh-Ikuenobe, Francisca, Jaramillo, Carlos A., Rueda, Milton J., and Cadena, Edwin A. 2012. "Palynology of the Eocene Esmeraldas Formation, Middle Magdalena Valley Basin, Colombia." Palynology, 36, (1) 96–111. https://doi.org/10.1080/01916122.2012.650548.