1. A study of laugh patterns in the theatre;Andrus;Speech Monographs,1946
2. Self perception: an alternative interpretation of cognitive dissonance phenomenon;Bem;Psychological Review,1967
3. Laughter, humor and play;Berlyne,1969
4. The effect of the social situation on humor;Calvert,1949
5. Some aspects of the social facilitation of “humorous laughter” in children;Chapman,1972