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Kawauchi, Gisele Y.; Sharma, Prashant P.; Giribet, Gonzalo (2012). “Sipunculan phylogeny based on six genes, with a new classification and the descriptions of two new families”. Zoologica Scripta(英語版)41 (2): 186-210. doi:10.1111/j.1463-6409.2011.00507.x.