Adrain, J. M., S. E. Peters, and S. R. Westrop. “The Marjuman Trilobite Cedarina Lochman: Thoracic Morphology, Systematics, and New Species from Western Utah and Eastern Nevada, USA”. Zootaxa, vol. 2218, no. 1, Sept. 2009, pp. 35–58, doi:10.11646/zootaxa.2218.1.2.