Williams, A., Popov, L. E., Holmer, L. E., Carlson, S. J., & Laurie, J. R. (2000). Part H, Brachiopoda (Revised), vol. 2 & 3, ch. 1, p. 1–157. Treatise on Invertebrate Paleontology. https://doi.org/10.17161/dt.v0i0.5206