1. Reducing drug abuse by enriching the environment with alternative non-drug reinforcers;Carroll,1996
2. On the law of effect;Herrnstein;Journal of the Experimental Analysis of Behavior,1970
3. The pleasant events schedule;MacPhillamy;Journal of Consulting and Clinical Psychology,1982
4. Matching theory in natural human environments;McDowell;The Behavior Analyst,1988
5. Choice, matching, and human behavior;Pierce;The Behavior Analyst,1983