↑(en) Claud W. Wright, John H. Callomon et Michael K. Howarth et Raymond C. Moore et Roger L. Kaesler (dir.), Treatise on Invertebrate Paleontology, vol. 4 : Cretaceous Ammonoidea, Boulder, Geological Society of America etc., (ISBN0-8137-3112-7), L: Mollusca 4.