M. K. S. Barnes. «A stalked barnacle — Pollicipes pollicipes». Marine Life Information Network for Britain & Ireland. Marine Biological Association of the United Kingdom, 10-02-2009. Arxivat de l'original el 2012-12-23. [Consulta: 11 gener 2010].
marlin.ac.uk
M. K. S. Barnes. «A stalked barnacle — Pollicipes pollicipes». Marine Life Information Network for Britain & Ireland. Marine Biological Association of the United Kingdom, 10-02-2009. Arxivat de l'original el 2012-12-23. [Consulta: 11 gener 2010].