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Shu DG, Luo HL, Conway Morris S, Zhang XL, Hu SX, Chen L, Han J, Zhu M, Li Y, Chen LZ (1999). "Lower Cambrian Vertebrates from South China". Nature. 402 (6757): 42–46. Bibcode:1999Natur.402...42S. doi:10.1038/46965. S2CID4402854.
Gaines, R; Kennedy, M; Droser, M (2005). "A New Hypothesis for Organic Preservation of Burgess Shale Taxa in the Middle Cambrian Wheeler Formation, House Range, Utah". Palaeogeography, Palaeoclimatology, Palaeoecology. 220 (1–2): 193–205. Bibcode:2005PPP...220..193G. doi:10.1016/j.palaeo.2004.07.034.
Mangano, M. G.; Bromley, R. G.; Harper, D. A. T.; Nielsen, A. T.; Smith, M. P.; Vinther, J. (2012). "Nonbiomineralized carapaces in Cambrian seafloor landscapes (Sirius Passet, Greenland): Opening a new window into early Phanerozoic benthic ecology". Geology. 40 (6): 519–522. Bibcode:2012Geo....40..519M. doi:10.1130/G32853.1.
Shu DG, Luo HL, Conway Morris S, Zhang XL, Hu SX, Chen L, Han J, Zhu M, Li Y, Chen LZ (1999). "Lower Cambrian Vertebrates from South China". Nature. 402 (6757): 42–46. Bibcode:1999Natur.402...42S. doi:10.1038/46965. S2CID4402854.