1. Effect of first-order conditional probability in a two-choice learning situation.
2. , & An introduction to mathematical learning theory. New York: John Wiley and Sons, 1965.
3. & (Eds.). Studies in mathematical learning theory. Stanford: Stanford Univ. Press, 1959.
4. Marginal and conditional stimulus and response probabilities in verbal conditioning.
5. A descriptive approach to the dynamics of choice behavior. In , & (Eds.), Logic, methodology and philosophy of science: Proceedings of the 1960 international congress. Stanford: Stanford Univ. Press 1962, pp. 424–433. (a)