Cook, H.J. 1930. New rhinoceroses from the Pliocene of Colorado and Nebraska. Proceedings of the Denver Museum of Natural History 9 (4): 44-51.
Gregory, W.K.; Cook, H.J. 1928. New material for the study of evolution: a series of primitive rhinoceros skulls (Trigonias) from the Lower Oligocene of Colorado. Proceedings of the Denver Museum of Natural History 8 (1): 3-32.
Cook, H.J. 1927. A new rhinoceros of the genus Teleoceras from Colorado. Proceedings of the Denver Museum of Natural History 7 (1): 1-5.
Cook, H.J. 1912. Notice of a new genus of rhinoceros from the lower Miocene. Science 35: 219-220.
Cook, H.J. 1912. A new species of rhinoceros (Diceratherium loomisi) from the lower Miocene of Nebraska. Nebraska Geological Survey 7 (4): 29-32.
Cook, H.J. 1912. A new genus and species of rhinoceros (Epiaphelops virgasectus) from the lower Miocene of Nebraska. Nebraska Geological Survey 7 (3): 21-22.
Cook, H.J. 1909. A new genus of rhinoceros from Sioux County, Nebraska. Nebraska Geological Survey 3 (6): 245-248.
Cook, H.J. 1908. A new rhinoceros from the lower Miocene of Nebraska. The American Naturalist, The Science Press, New York; XLII (500): 543-545, 2 figs..






