1. Punishment and shock intensity;Appel;Science,1963
2. Depression;Beck,1967
3. Cognitive Therapy and the Emotional Disorders;Beck,1976
4. Sidman avoidance in the fish;Behrend;J. exp. Anal. Beh.,1963
5. Dementia Praecox or the Group of Schizophrenias;Blueler,1911