HOWARTH, Michael K. Treatise Online no. 57: Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eodoceratoidea, Hildoceratoidea. Treatise Online, [S. l.], 2013. DOI: 10.17161/to.v0i0.4441. Disponível em: https://journals.ku.edu/treatiseonline/article/view/4441.. Acesso em: 6 may. 2024.