1. Psychologie du temps;Fraisse,1957
2. Estimation of time;Frankenhaeuser,1959
3. Uncertainty and structure as psychological concepts;Garner,1962
4. A theory and factory experiment on the time-drag concept of boredom;Kerr;J. Appl. Psychol.,1963
5. The influence of different activities on the apparent length of time;Loehlin;Psychol. Monogr.,1959