1. Russell W. M. S., Burch R. L., The Principles of Humane Experimental Technique (Methuen, London, 1959)reprinted, Universities Federation for Animal Welfare, Wheathampstead, UK, 1992).
2. European Science Foundation (ESF) Policy Briefing “Use of Animals in Research” (ESF Strasbourg France August 2001); (www.esf.org/publication/115/ESPB15.pdf).
3. Bankowski Z., Howard-Jones N., International Guiding Principles for Biomedical Research Involving Animals [Committee of International Organizations of Medical Science (CIOMS, Geneva, 1986)].
4. National Research Council, Guide for the Care and Use of Laboratory Animals, ed. 7 (National Academies Press, Washington, DC, 1996).
5. Organisation for Economic Cooperation and Development (OECD) “Guidance document on the recognition assessment and use of clinical signs as humane endpoints for experimental animals used in safety evaluation” (OECD Paris 2000); [www.olis.oecd.org/olis/2000doc.nsf/LinkTo/env-jm-mono(2000)7].