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2. The Fossils of the Burgess Shale;Briggs,1994
3. A Cambrian gilled lobopod from Greenland;Budd;Nature,1993
4. A possible anomalocaridid from the Cambrian Sirius Passet Lagerstätte, North Greenland;Daley;Journal of Paleontology,2010
5. Erwin, D. H. and Valentine, J. W. (2013). The Cambrian Explosion. Greenwood Village, CO: Roberts.