Bermúdez, Hermann, Jenny García, Wolfgang Stinnesbeck, Gerta Keller, José Rodríguez, Michael Hanel, Jens Hopp, et al. 2016. “The Cretaceous–Palaeogene Boundary at Gorgonilla Island, Colombia, South America”. Terra Nova 28: 83-90. doi:10.1111/ter.12196.