How old is the Isthmus of Panama?DOI: info:10.5343/bms.2012.1076v. 89No. 4University of Miami - Rosenstiel School of Marine and Atmospheric Science801–813
Coates, Anthony G. and Stallard, Robert F. 2013. "How old is the Isthmus of Panama?" Bulletin of Marine Science, 89, (4) 801–813. https://doi.org/10.5343/bms.2012.1076.