http://www.medslugs.de/E/Med/Elysia_viridis/Selection.htm
http://ourworld.compuserve.com/homepages/BMLSS/molluscs.htm
http://www.asterisk.no/~emil/nudibranchia/elysia_viridis.htm
http://www.marenostrum.org/opistobranquios/eviridis/elysia.htm
http://www.seaslugforum.net/showall/elysviri
http://www.medslugs.de/E/Atl-NE/Elysia_viridis/Selection.htm
http://www.ugr.es/~lstocino/elysia_viridis.htm
http://www.medslugs.de/E/Atl-E/Elysia_viridis/Selection.htm
http://www.nembro.info/uk_elysia_viridis.html
http://www.nudibranch.org/Scottish%20Nudibranchs/elysia-viridis.html
http://www.habitas.org.uk/marinelife/species.asp?item=W10620
http://www.guiamarina.com/gallery/v/Baltic+Sea/03+Animals/05+Mollusca/Opisthobranchia/Elysia+viridis/
http://www.nudipixel.net/species/elysia_viridis/
http://sacoglossa.lifedesks.org/pages/34292
http://hypselodoris.blogspot.pt/2011/03/elysia-viridis-montagu-1804.html
http://opistobranquis.info/en/guia/sacoglossa/elysia-viridis/