1. Systematics and phylogenetics of polymeroid trilobites from the Henson Gletscher and Kap Stanton formations (Middle Cambrian), North Greenland;Babcock;Grønlands Geologiske Undersøgelse Bulletin,1994
2. Biogeography and biofacies patterns of Middle Cambrian polymeroid trilobites from North Greenland: palaeogeographic and palaeo-oceanographic implications;Babcock;Grønlands Geologiske Undersøgelse Bulletin,1994
3. Trilobites in Paleozoic predator-prey systems, and their role in reorganization of early Paleozoic ecosystems;Babcock,2003
4. The Global boundary Stratotype Section and Point (GSSP) of the Drumian Stage (Cambrian) in the Drum Mountains, Utah, USA;Babcock;Episodes,2007
5. Cambrian stage and series nomenclature of Laurentia and the developing chronostratigraphic scale;Babcock;Museum of Northern Arizona Bulletin,2011