OKULITCH, Vladimir J. Part E, Archaeocyatha, Ch.1, p.1-20. Treatise on Invertebrate Paleontology, [S. l.], 1955. DOI: 10.17161/tip.v0i0.5125. Disponível em: https://journals.ku.edu/InvertebratePaleo/article/view/5125.. Acesso em: 5 may. 2024.