Zhuravlev, Andrey; Riding, Robert (2000). The Ecology of the Cambrian Radiation. Columbia University Press. ISBN978-0-231-10613-9. „The Cambrian radiation was the explosive evolution of marine life that started 550,000,000 years ago. It ranks as one of the most important episodes in Earth history.“
doi.org
angl.a ... picture consistent with body plans being assembled during this time Budd, G. E.; Jensen, S. (2000). „A critical reappraisal of the fossil record of the bilaterian phyla“. Biological Reviews of the Cambridge Philosophical Society. 75 (2): 253–95. doi:10.1111/j.1469-185X.1999.tb00046.x. PMID10881389. S2CID39772232.
angl.a ... picture consistent with body plans being assembled during this time Budd, G. E.; Jensen, S. (2000). „A critical reappraisal of the fossil record of the bilaterian phyla“. Biological Reviews of the Cambridge Philosophical Society. 75 (2): 253–95. doi:10.1111/j.1469-185X.1999.tb00046.x. PMID10881389. S2CID39772232.
angl.a ... picture consistent with body plans being assembled during this time Budd, G. E.; Jensen, S. (2000). „A critical reappraisal of the fossil record of the bilaterian phyla“. Biological Reviews of the Cambridge Philosophical Society. 75 (2): 253–95. doi:10.1111/j.1469-185X.1999.tb00046.x. PMID10881389. S2CID39772232.