http://www.seaslugforum.net/elysgord.htm http://www.medslugs.de/E/Med/Elysia_gordanae/Selection.htm http://www.medslugs.de/E/Atl-E/Elysia_gordanae/Selection.htm http://opistobranquis.info/en/guia/sacoglossa/elysia-gordanae/