3R-Prinzip
Russell, William M.S. / Burch, Rex L. (1959): The Principles of Humane Experimental Technique. London: Methuen, insbesondere 69-154. Online Version
Deutsches Zentrum zum Schutz von Versuchstieren (Bf3R) Online Version
European Union Reference Laboratory for alternatives to animal testing (EURL-ECVAM) Online Version
European Partnership for Alternative Approaches to Animal Testing (EPAA) Online Version