Aris-Brosou, S. and Yang, Z. 2002. Effects of models of rate evolution on estimation of divergence dates with special reference to the metazoan 18S ribosomal RNA phylogeny. Systematic Biology, 51:703–714.
Aris-Brosou, S. and Yang, Z. 2003. Bayesian models of episodic evolution support a late precambrian explosive diversification of the metazoa. Molecular Biology and Evolution, 20:1947–1954.
Bromham, L., Rambaut, A., and Harvey, P.H. 1996. Determinants of rate variation in mammalian DNA sequence evolution. Journal of Molecular Evolution 43(6): 610–621.
Bromham, L., Rambaut, A., Fortey, R., Cooper, A., and Penny, D. 1998. Testing the Cambrian explosion hypothesis by using a molecular dating technique. Proceedings of the National Academy of Sciences, USA, 95:12386–12389.
Drummond, A., Ho, S.Y.W., Phillips, M.J., and Rambaut, A. 2006. Relaxed phylogenetics and dating with confidence. PLoS Biology, in press.
Hedges, S.B., Blair, J.E., Venturi, M.L., and Shoe J.L. 2004. A molecular timescale of eukaryote evolution and the rise of complex multicellular life. BMC Evolutionary Biology, 4:2.
Ho, S.Y.W., Phillips, M.J., Drummond, A.J., and Cooper, A. 2005. Accuracy of rate estimation using relaxed-clock models with a critical focus on the early metazoan radiation. Molecular Biology and Evolution, 22:1355–1363.
Kishino, H., Thorne, J.L., and Bruno, W.J. 2001. Performance of a divergence time estimation method under a probabilistic model of rate evolution. Molecular Biology and Evolution, 18:352–361.
Peterson, K.J., Lyons, J.B., Nowak, K.S., Takacs, C.M., Wargo, M.J., and McPeek, M.A. 2004. Estimating metazoan divergence times with a molecular clock. Proceedings of the National Academy of Sciences, USA, 101:6536–6541.
Runnegar, B. 1982. A molecular-clock date for the origin of the animal phyla. Lethaia, 15:199–205.
Sanderson, M.J. 2002. Estimating absolute rates of molecular evolution and divergence times: a penalized likelihood approach. Molecular Biology and Evolution, 19:101–109.
Wang, D.Y.-C., Kumar, S., and Hedges, S.B. 1999. Divergence time estimates for the early history of animal phyla and the origin of plants, animals and fungi. Proceedings of the Royal Society of London B, 266:163–171.
Welch, J.J. and Bromham, L. 2005. Molecular dating when rates vary. Trends in Ecology and Evolution, 20:320–327.
Welch, J.J., Fontanillas, E., Bromham, L. 2005. Molecular dates for the "Cambrian explosion": the influence of prior assumptions. Systematic Biology, 54:672–678.
Wray, G.A., Levinton, J.S., and Shapiro, L.H. 1996. Molecular evidence for deep Precambrian divergences among metazoan phyla. Science, 274:568–573.