KORN, Dieter; BOCKWINKEL, Jürgen. The early gephuroceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea). European Journal of Taxonomy, [S. l.], v. 823, n. 1, p. 10–47, 2022. DOI: 10.5852/ejt.2022.823.1811. Disponível em: https://ejt.sandbox.publicknowledgeproject.org/index.php/ejt/article/view/1811. Acesso em: 24 apr. 2026.