Mark S. Springer, Angela Burk-Herrick, Robert Meredith, Eduardo Eizirik, Emma Teeling, Stephen J. O'Brien et William J. Murphy : « The Adequacy of Morphology for Reconstructing the Early History of Placental Mammals », Syst. Biol., vol. 56, n°4, 2007, pp. 673-684
J.R. Wible, G.W. Rougier, M.J. Novacek et R.J. Asher : « Cretaceous eutherians and Laurasian origin for placental mammals near the K/T boundary », Nature vol. 447, 2007, pp. 1003-1006
Kenneth David Rose : The Beginning of the Age of Mammals, Johns Hopkins University Press, Baltimore, 2006, 428 p., ISBN 978-0801884726, extraits ici
Shawn P. Zack, Tonya A. Penkrot, David W. Krause et Mary C. Maas : « A new apheliscine “condylarth” mammal from the late Paleocene of Montana and Alberta and the phylogeny of “hyopsodontids” », Acta Palaeontologica Polonica, vol. 50 , n°4, 2005, pp. 809–830
Kenneth D. Rose et J. David Archibald : The rise of placental mammals: origins and relationships of the major extant clades, Johns Hopkins University Press, Baltimore, 2005, ISBN 978-0801880223
Mark S. Springer, Michael J. Stanhope, Ole Madsen et Wilfried W. de Jong : « Molecules consolidate the placental mammal tree », Treds in Ecology and Evolution, vol. 19, n°8, 2004, pp. 430-438
J. David Archibald : « Timing and biogeography of the eutherian radiation: fossils and molecules compared », Molecular Phylogenetics and Evolution, vol. 28, 2003, pp. 350–359
William J. Murphy, Eduardo Eizirik, Stephen J. O'Brien, Ole Madsen, Mark Scally, Christophe J. Douady, Emma Teeling, Oliver A. Ryder, Michael J. Stanhope, Wilfried W. de Jong et Mark S. Springer : « Resolution of the Early Placental Mammal Radiation Using Bayesian Phylogenetics », Science, vol. 294, n°5550, 2001, pp. 2348-2351
Richard L. Cifelli : « Early mammalian radiations », Journal of Paleontology, 2001