1. Frustration, persistence, and regression;Amsel,1971
2. Influence of major surgical stress on plasma levels of testosterone, luteinizing hormone and follicle-stimulating hormone in male patients;Aono;J. Clin. Endocrinol. Metab.,1972
3. Extinction induced aggression;Azrin;J. Exp. Anal. Behav.,1966
4. “Conflict, Arousal and Curiosity”;Berlyne,1960
5. Berlyne, D. E. (1967). Arousal and reinforcement. In “Nebraska Symposium on Motivation” (D. Levine, ed.). Univ. Nebraska Press, Lincoln.