Bales, G.S. 2001. A morphometric contribution to rhinoceros phylogeny. Canonical variate studies of extant and fossil skulls (Rhinocerotoidea: Perissodactyla). Journal of Vertebrate Paleontology 21 (Suppl. To no. 3): 31A.
Bales, G.S. 1998. Patterns of foramen magnum size and shape in Rhinocerotoidea (Ceratomorpha: Perissodactyla). Journal of Vertebrate Paleontology 18 (Suppl. To no. 3): 25A-26A.
Bales, G.S. 1996. Skull evolution in the Rhinocerotidae (Mammalia, Perissodactyla): cartesian transformations and functional interpretations. Journal of Mammalian Evolution 3 (3): 261-279, figs. 1-9, table 1.
Bales, G.S. 1995. A multivariate morphometric study of living and fossil rhinoceros skulls. Los Angeles, University of South California, Ph.D. Thesis. pp. 1-416.
Bales, G.S. 1994. Skull evolution in living and fossil rhinoceroses: morphometric analyses of within and between group variation. Journal of Morphology 220 (3): 322-323.
Bales, G.S. 1993. A multivariate comparison of variation in fossil and living rhinoceros skulls. Journal of Vertebrate Paleontology 13 (Suppl. To no. 3): 24A-25A.
Bales, G.S. 1992. Thin-plate spline analysis of shape differences between a primitive and modern rhinoceros..






