1. Preliminary report on the application of contingent reinforcement procedures (token economy) on a “chronic” psychiatric ward;Atthowe;Journal of Abnormal Psychology,1968
2. The token economy: A motivational system for therapy and rehabilitation;Ayllon,1968
3. Some effects of noise on human operant behavior;Azrin;Journal of the Experimental Analysis of Behavior,1958
4. Motivational aspects of escape and punishment;Azrin;Journal of the Experimental Analysis of Behavior,1965
5. Punishment;Azrin,1966