1. Cooper JR, Bloom FE, Roth RH (1982): The Biochemical Basis of Neuropharmacology, 4th ed. Oxford: Oxford University Press
2. Heise GA, Milar KS (1984): Drugs and stimulus control. In: Handbook of Psychopharmacology, vol 18, Iversen LL, Iversen SD, Snyder SH, eds. New York: Plenum Press, pp 129–190
3. Iversen SD, Iversen LL (1981): Behavioural Pharmacology. New York: Oxford Press
4. Morse WH, McKearney JW, Kelleher RT (1977): Control of behavior by noxious stimuli. In: Handbook of Psychopharmacology, vol 7, Iversen LL, Iversen SD, Snyder SH, eds. New York: Plenum Press, pp 151–180
5. Wikler A (1965): Conditioning factors in opiate addiction and relapse. In: Narcotics, Wilmer DM, Kassenbaum GG, eds. New York: McGraw-Hill, pp 85–100