| Cook H. J. (1934) New artiodactyls from the Oligocene and Lower Miocene of Nebraska, American Midland Naturalist 15 2, 148-165 |
| Wood A. E. (1937) The Mammalian Fauna of the White River Oligocene: Part II. Rodentia, Transactions of the American Philosophical Society 28 2, 155-269 |
| Schultz C. B., Falkenbach C. H. (1956) Miniochoerinae and Oreonetinae two new subfamilies of oreodonts, Bulletin of the American Museum of Natural History 109 4, 373-482 |
| Schultz C. B., Falkenbach C. H. (1968) The Phylogeny of the Oreodonts. Part 1: Merycoidodontinae, Eporeodontinae, and Leptaucheniinae, Three Subfamilies Of Oreodonts, With an Appendix to the Revision Of The Merycoidodontidae, and Part 2. Summary and Conclusions Concerning the Merycoidodontidae, Bulletin of the American Museum of Natural History 139, 1-498 |
| Tanner L. G. (1973) Notes Regarding Skull Characteristics of Oxetocyon cuspidatus Green, Transactions of the Nebraska Academy of Sciences 2, 66-69 |
| Edwards P. (1976) The subfamily Leptochoerinae (Artiodactyla, Dichobunidae) of North America (Oligocene), Contributions to Geology, University of Wyoming 14 2, 99-113 |
| Korth W. W. (1981) New Oligocene rodents from western North America, Annals of Carnegie Museum 50 10, 289-318 |
| Estes R. (1983) Sauria terrestria, Amphisbaenia, Handbuch der Paläoherpetologie 10A, 1-249 |
| Wahlert J. H. (1984) Kirkomys, a new florentiamyid (Rodentia, Geomyoidea) from the Whitneyan of Sioux County, Nebraska, American Museum Novitates 2793 |
| Simpson W. F. (1985) Geology and paleontology of the Oligocene Harris Ranch Badlands, southwestern South Dakota, Dakoterra 2 2, 303-333 |
| Korth W. W., Hageman J. (1988) Lagomorphs (Mammalia) from the Oligocene (Orellan and Whitneyan) Brule Formation, Nebraska, Transactions of the Nebraska Academy of Sciences 16, 141-152 |
| Korth W. W. (1989) Aplodontid Rodents (Mammalia) from the Oligocene (Orellan and Whitneyan) Brule Formation, Nebraska, Journal of Vertebrate Paleontology 9 4, 400-414 |
| Korth W. W., Emry R. J. (1991) The Skull of Cedromus and a Review of the Cedromurinae (Rodentia, Sciuridae), Journal of Paleontology 65 6, 948-994 |
| Heaton T. H. (1993) The Oligocene Rodent Ischyromys of the Great Plains: Replacement Mistaken for Anagenesis, Journal of Paleontology 67 2 |
| Wang X. (1994) Phylogenetic systematics of the Hesperocyoninae (Carnivora: Canidae), Bulletin of the American Museum of Natural History 221, 1-207 |
| Prothero D. R. (1996) Camelidae, The Terrestrial Eocene-Oligocene Transition in North America, 609-651 |
| Prothero D. R. (1996) Hyracodontidae, The Terrestrial Eocene-Oligocene Transition in North America, 652-663 |
| Wang X., Tedford R. H. (1996) , The Terrestrial Eocene-Oligocene Transition in North America |
| Wang X., Tedford R. H., et al (1999) Phylogenetic systematics of the Borophaginae (Carnivora: Canidae), Bulletin of the American Museum of Natural History 243, 1-392 |
| Alroy J. (2002) Synonymies and reidentifications of North American fossil mammals |
| Meehan T. J., Martin L. D. (2004) Emended genus description and a new species of Hypisodus (Artiodactyla: Ruminantia: Hypertragulidae), in Paleogene Mammals, S. G. Lucas, K. E. Zeigler, and P.E. Kondrashov (eds.), New Mexico Museum of Natural History and Science Bulletin 26, 137-143 |
| Prothero D. R. (2005) The Evolution of North American Rhinoceroses, 1-218 |
