1. Bauermeister, J. J. Positive reinforcement: Further tests of the Premack theory. Unpublished doctoral dissertation, Florida State University, 1970.
2. Premack, D. Reversibility of the reinforcement relation. Science, 1962, 136, 255–257.
3. Premack, D. Reinforcement theory. In D. Levine (Ed.), Nebraska symposium on motivation, 1965. Lincoln: University of Nebraska Press, 1965. Pp. 123–180.
4. Premack, D. Catching up with common sense or two sides of a generalization: Reinforcement and punishment. In R. Glaser (Ed.), The nature of reinforcement. New York: Academic Press, 1971. Pp. 121–150.
5. Schaeffer, R. W. A new device for programming contingencies between drinking, running, and lever pressing. Journal of the Experimental Analysis of Behavior, 1966, 9, 529–533.