1. Ferster CB, Skinner BF. Schedules of reinforcement. Englewood Cliffs: Prentice-Hall; 1957.
2. Kazdin AE. History of behavior modification. Experimental foundation of contemporary research. Baltimore: University Park Press; 1978.
3. Skinner BF. Walden two. New York: Macmillan; 1976.
4. Ferster CB, Nurnberger JI, Levitt E. The control of eating. J Mathetics. 1962;1:87–109.
5. Foreyt JP. Behavioral treatments of obesity. New York: Pergamon Press; 1977.