1. Inference of pain sensitivity from complex behaviors of laboratory animals;Vierck,1989
2. Guidelines for assessing pain reactions and pain modulation in laboratory animal subjects;Vierck,1984
3. Effects of systemic morphine on responses of primates to first or second pain sensations;Yeomans;Pain,1996
4. Methods of assessing pain in animals;Dubner,1994
5. Human and non-human reactions to painful electrocutaneous stimuli and to morphine;Vierck,1983