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The Terrestrial Eocene-Oligocene Transition in North America By Donald R. Prothero and Robert J. Emry ISBN0-521-43387-8
Flynn, J.J., 1998. Early Cenozoic Carnivora ("Miacoidea"). pp. 110–123 in C.M. Janis, K.M. Scott, and L.L. Jacobs (eds.) Evolution of Tertiary Mammals of North America. Volume 1: Terrestrial Carnivores, Ungulates, and Ungulatelike Mammals. Cambridge University Press, Cambridge. ISBN0-521-35519-2