Holmer, L. E., M. G. Bassett, and L. E. Popov. “Part H, Brachiopoda (Revised), Vol. 6, Ch. 3, P. 2532–2590”.
Treatise on Invertebrate Paleontology
(January 1, 2007). Accessed May 6, 2025.
https://journals.ku.edu/InvertebratePaleo/article/view/5517
.