1. AVMA, 2007. AVMA guidelines on euthanasia. Available at: http://www.avma.org/issues/animal_welfare/euthanasia.pdf (accessed December 2008).
2. Physiologic and behavioural evaluation of CO euthanasia of adult dogs;Chalifoux;Am. J. Vet. Res.,1983
3. Cooling of rats in carbon dioxide;Chapin;Am. J. Physiol.,1963
4. An experimental study of acute carbon monoxide intoxication in dogs;de Vries;Acta Pharmacol. Toxicol. (Copenh.),1977
5. Euthanasia of mink (Mustela vison) by means of carbon dioxide (CO2), carbon monoxide (CO) and nitrogen (N2);Hansen;Br. Vet. J.,1991