Penkalski, P; Dodson, P (1999). "The morphology and systematics of Avaceratops, a primitive horned dinosaur from the Judith River Formation (Late Campanian) of Montana, with the description of a second skull". Journal of Vertebrate Paleontology. 19 (4): 692–711. Bibcode:1999JVPal..19..692P. doi:10.1080/02724634.1999.10011182.
Stanton, T.W.; Hatcher, J.B. (1905). "Geology and paleontology of the Judith River Beds". Journal of Geology. 257 (6): 1–174. Bibcode:1907JG.....15..601S. doi:10.1086/621438.
Penkalski, P; Dodson, P (1999). "The morphology and systematics of Avaceratops, a primitive horned dinosaur from the Judith River Formation (Late Campanian) of Montana, with the description of a second skull". Journal of Vertebrate Paleontology. 19 (4): 692–711. Bibcode:1999JVPal..19..692P. doi:10.1080/02724634.1999.10011182.
Stanton, T.W.; Hatcher, J.B. (1905). "Geology and paleontology of the Judith River Beds". Journal of Geology. 257 (6): 1–174. Bibcode:1907JG.....15..601S. doi:10.1086/621438.