Sømme, LS (14 January 2005). „Sentience and pain in invertebrates”. Norwegian Scientific Committee for Food Safety. Arhivirano iz originala na datum 2011-10-17. Pristupljeno 30 September 2009.
Sømme, LS (14 January 2005). „Sentience and pain in invertebrates”. Norwegian Scientific Committee for Food Safety. Arhivirano iz originala na datum 2011-10-17. Pristupljeno 30 September 2009.