Alvarez, F., MacKinnon, D. I., Savage, N. M., Jia-Yu, R., Carlson, S. J., & Cooper, P. (2002). Part H, Brachiopoda (Revised), vol. 4, ch. 8, p. 1584–1616. Treatise on Invertebrate Paleontology. https://doi.org/10.17161/dt.v0i0.5569