Howarth, Michael. “Treatise Online No. 128: Part L, Revised, Volume 3B, Chapter 2: Systematic Descriptions of the Jurassic and Cretaceous Phylloceratoidea, Boreophylloceratoidea, and Aequiloboidea”. Treatise Online (January 13, 2020). Accessed November 23, 2024. https://journals.ku.edu/treatiseonline/article/view/13358.