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• Smith, A.B. (2006). “The pre-radial history of echinoderms”. Geological Journal. 40 (3): 255–280. doi:10.1002/gj.1018.
• Williamson D I (2003). "The Origins of Larvae", xviii + 261 pp, ISBN 1-4020-1514-3. Kluwer. Dordrecht. (Chaps 8–12 cover echinoderm larvae).

Rajakumar CP., (2002) Studies on the echinoderm fauna of the Muttom and Colachel coasts (South West bờ biển của India) PhD Thesis, University of Kerala, India.Bản mẫu:Translation/ref