1. Adler, R., and Lomazzi, F., 1973, Perceptual style and pain tolerance. I. The influence of certain psychological factors, J. Psychosom. Res. 17:369–379.
2. Altman, J., and Mansky, P. A., 1977, A conceptual model of drug dependence, in: Renewal in Psychiatry: A Critical Rational Perspective (T. C. Manschreck and A. M. Kleinman, eds.), pp. 139–161, Hemisphere Publishing Corp., Washington, D.C.
3. Andrews, H. L., and Himmelsbach, C. K., 1944, Relationship of the intensity of the morphine abstinence syndrome to dosage, J. Pharmacol. Exp. Ther. 81:288–293.
4. Axelrod, J., 1956a, Possible mechanisms of tolerance to narcotic drugs, Science 124:263–264.
5. Axelrod, J., 1956b, The enzymatic N-demethylation of narcotic drugs, J. Pharmacol. 117:322–350.