1. Andreu , A. C 1987 Ecologia dinamica poblacional de la tortuga mora, Testudo graeca , en Donana University of Seville
2. Animal Protection Agency 2012 Environment Audit Committee, House of Commons
3. AVMA (American Veterinary Medical Association) 2013 AVMA Guidelines for the Euthanasia of Animals: 2013 Edition https://www.avma.org/KB/Policies/Pages/Euthanasia-Guidelines.aspx