1. Adams, S. Temporal changes in the strength of competing verbal associates. Unpublished, doctoral dissertation, University of California, Berkeley, 1961.
2. Cited by L. Postman, The present status of interference theory. In C. N. Cofer, (Ed.), Verbal learning and verbal behavior. New York: McGraw-Hill, 1961.
3. Barnes, J. M., & Underwood, B. J. “Pate” of first-list associations in transfer theory. J. exp. Psychol., 1959, 58, 97–105.
4. Briggs. G. E. Acquisition, extinction, and recovery functions in retroactive inhibition. J. exp. Psychol., 1954, 47, 285–293.
5. Gleitman, H.., & Jung, L. Retention in rats: The effect of proactive interference. Science, 1963, 142, 1683–1684.