Longrich N. R., Sankey J. and Tanke D. (2010). Texacephale langstoni, a new genus of pachycephalosaurid (Dinosauria: Ornithischia) from the upper Campanian Aguja Formation, southern Texas, USA. Cretaceous Research. doi:10.1016/j.cretres.2009.12.002.
Evans D. C., Schott R. K., Larson D. W., Brown C. M., Ryan M. J. (2013). The oldest North American pachycephalosaurid and the hidden diversity of small-bodied ornithischian dinosaurs. Nature Communications4: 1828. Bibcode 2013NatCo…4E1828E. doi:10.1038/ncomms2749. PMID 23652016.
Evans D. C., Schott R. K., Larson D. W., Brown C. M., Ryan M. J. (2013). The oldest North American pachycephalosaurid and the hidden diversity of small-bodied ornithischian dinosaurs. Nature Communications4: 1828. Bibcode 2013NatCo…4E1828E. doi:10.1038/ncomms2749. PMID 23652016.