Nakanishi, Nagayasu; Yuan, David; Jacobs, David K.; Hartenstein, Volker (2008). «Early development, pattern, and reorganization of the planula nervous system in Aurelia (Cnidaria, Scyphozoa)». Development Genes and Evolution. 218 (10): 511–524. doi:10.1007/s00427-008-0239-7.CS1-vedlikehold: Flere navn: forfatterliste (link)
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Trueb, William E. Duellman, Linda Trueb ; illustrated by Linda (1994). Biology of amphibians (Johns Hopkins pbk. utgave utg.). Baltimore: Johns Hopkins University Press. s. 179-194. ISBN080184780X.