Cowles, David (2006). "Serpula vermicularis Linnaeus, 1767". Invertebrates of the Salish Sea. Rosario Beach Marine Laboratory at Walla Walla University. Archived from the original on 2011-10-02. Retrieved 2011-10-31.
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Cowles, David (2006). "Serpula vermicularis Linnaeus, 1767". Invertebrates of the Salish Sea. Rosario Beach Marine Laboratory at Walla Walla University. Archived from the original on 2011-10-02. Retrieved 2011-10-31.