Williams, A., Carlson, S. J., Wright, A. D., & Harper, D. A. T. (2000). Part H, Brachiopoda (Revised), vol. 2 & 3, ch. 7, p. 689–782.
Treatise on Invertebrate Paleontology
.
https://doi.org/10.17161/dt.v0i0.5212