1. Unlearning and competition in the retention of verbal materials;Grayson,1966
2. Retroactive and proactive inhibition;Keppel,1968
3. Hilgard and Marquis' Conditioning and learning;Kimble,1961
4. Unlearning under conditions of successive interpolation;Postman;J. exp. Psychol.,1965
5. Unlearning as a function of the relationship between successive response classes;Postman;J. exp. Psychol.,1965