David Archibald. Extinction and Radiation: How the Fall of Dinosaurs Led to the Rise of Mammals. Baltimore: Johns Hopkins University Press, 2011.
59
Janis. Victors by Default. P. 173.
60
Phil Jardine. Patterns in Palaeontology: The Paleocene-Eocene Thermal Maximum // Paleontology Online 1, 2011. P. 5. URL: www.palaeontologyonline.com/articles/2011/the-paleocene-eocene-thermal-maximum/
