Babcock, L.E. 1994. “Biogeography and Biofacies Patterns of Middle Cambrian Polymeroid Trilobites from North Greenland: Palaeogeographic and Palaeo-Oceanographic Implications”. Bulletin Grønlands Geologiske Undersøgelse 169 (January). Copenhagen, Denmark:129-47. https://doi.org/10.34194/bullggu.v169.6728.