Korn, D., and D. Weyer. “The Ammonoids from the Gattendorfia Limestone of Gattendorf (Devonian–Carboniferous Boundary; Upper Franconia, Germany)”. European Journal of Taxonomy, vol. 883, no. 1, July 2023, pp. 1-61, doi:10.5852/ejt.2023.883.2179.