√ČNAY, Raymond; HOWARTH, Michael K. Treatise Online no. 120: Part L, Volume 3B, Chapter 7: Systematic Descriptions of the Perisphinctoidea. Treatise Online, [S. l.], 2019. DOI: 10.17161/to.v0i0.11672. Dispon√≠vel em: https://journals.ku.edu/treatiseonline/article/view/11672.. Acesso em: 21 may. 2024.