1. Teaching 2: Cognitive learning and instruction;Becker,1975
2. Learning strategies as determinants of memory deficiencies;Belmont;Cognitive Psychology,1971
3. On the theory and practice of improving short-term memory;Butterfield;American Journal of Mental Deficiency,1973
4. Facilitating the acquisition of an “in front” spatial discrimination;Dixon;Acta Symbolica,1974
5. Conceptual learning;Englemann,1969