Erwin, D. H.; Laflamme, M.; Tweedt, S. M.; Sperling, E. A.; Pisani, D.; Peterson, K. J. (2011). ”The Cambrian conundrum: early divergence and later ecological success in the early history of animals”. Science 334 (6059): sid. 1091–1097. doi:10.1126/science.1206375. PMID 22116879. Bibcode: 2011Sci...334.1091E.
Kouchinsky, A.; Bengtson, S.; Runnegar, B. N.; Skovsted, C. B.; Steiner, M.; Vendrasco, M. J. (2012). ”Chronology of early Cambrian biomineralization”. Geological Magazine 149 (2): sid. 221–251. doi:10.1017/s0016756811000720.
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Erwin, D. H.; Laflamme, M.; Tweedt, S. M.; Sperling, E. A.; Pisani, D.; Peterson, K. J. (2011). ”The Cambrian conundrum: early divergence and later ecological success in the early history of animals”. Science 334 (6059): sid. 1091–1097. doi:10.1126/science.1206375. PMID 22116879. Bibcode: 2011Sci...334.1091E.
Erwin, D. H.; Laflamme, M.; Tweedt, S. M.; Sperling, E. A.; Pisani, D.; Peterson, K. J. (2011). ”The Cambrian conundrum: early divergence and later ecological success in the early history of animals”. Science 334 (6059): sid. 1091–1097. doi:10.1126/science.1206375. PMID 22116879. Bibcode: 2011Sci...334.1091E.
