^ 1.01.1Robert M. Sullivan. Revision of the dinosaur Stegoceras Lambe (Ornithischia, Pachycephalosauridae). Journal Of Vertebrate Paleontology. 2003, 23 (1): 181–207.
Sullivan, RM. (2003). "Hanssuesia, the correct generic name for 'Hanssuessia' Sullivan, 2003". Journal of Vertebrate Paleontology 23(3):714