Boardman, R. S., A. H. Cheetham, D. B. Blake, John Utgaard, O. L. Karklins, P. L. Cook, P.A. Sandberg, Genevieve Utaud, and T. S. Wood. “Part G, Bryozoa (Revised), Vol. 1, References and Index”. Treatise on Invertebrate Paleontology (January 1, 1983). Accessed May 4, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5184.