Brunton, C. H. C., Wardlaw, B., Yu-Gan, J., & Lazarev, S. (2000). Part H, Brachiopoda (Revised), vol. 2 & 3, ch. 5, p. 565–619. Treatise on Invertebrate Paleontology. https://doi.org/10.17161/dt.v0i0.5210