http://www.medslugs.de/E/Med/Notarchus_punctatus/Selection.htm
http://www.ne.jp/asahi/kappa-kuri/miyamoto/OSEHOO/umiushi82.html
http://www.sea-slug.com/species/umiusi253.htm
http://www.seaslugforum.net/showall/notapunc
http://www.fitweb.or.jp/~janolus/021109.htm
http://opistobranquis.info/en/guia/anaspidea/notarchus-punctatus/