Gapp, I.W., Lieberman, B.S., Pope, M.C. and Dilliard, K.A. 2011.

New olenelline trilobites from the Northwest Territories, Canada, and the phylogenetic placement of Judomia absita Fritz, 1973

. Zootaxa. 2918, 1 (Jun. 2011), 15–28. DOI:https://doi.org/10.11646/zootaxa.2918.1.2.