Acosta-Jofré, M. S., R. Sahade, J. Laudien, and M. B. Chiappero. “A Contribution to the Understanding of Phylogenetic Relationships Among Species of the Genus Octopus (Octopodidae: Cephalopoda)”. Scientia Marina, vol. 76, no. 2, June 2012, pp. 311-8, doi:10.3989/scimar.03365.03B.