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"Estimation of divergence times in cnidarian evolution based on mitochondrial protein-coding genes and the fossil record". Molecular Phylogenetics & Evolution. 62 (1): 329-45. January 2012. doi:10.1016/j.ympev.2011.10.008. PMID22040765.
Seipel, K. (June 2005). "Evolution of striated muscle: Jellyfish and the origin of triploblasty". Developmental Biology. 282 (1): 14-26. doi:10.1016/j.ydbio.2005.03.032. PMID15936326.