1. Stimulus sampling theory;Atkinson,1963
2. The token economy: A motivational system for therapy and rehabilitation;Ayllon,1968
3. Punishment;Azrin,1966
4. Fixed-ratio punishment;Azrin;Journal of Experimental Analysis of Behavior,1963
5. Autism reversal: Eliminating stereotyped self-stimulation of retarded individuals;Azrin;American Journal of Mental Deficiency,1973