Utgaard, John, and D. B. Blake. “Part G, Bryozoa (Revised), Vol. 1, Ch. 4, P. 358-488”.
Treatise on Invertebrate Paleontology
(January 1, 1983). Accessed April 8, 2025.
https://journals.ku.edu/InvertebratePaleo/article/view/5182
.