1. “Bibliography: Psychological Considerations in Exercise, Including Exercise as Psychotherapy, Exercise Dependence (Exercise Addiction) and the Psychology of Running.”;Sachs,1981
2. “The Principles of Psychology.”;James,1910
3. Involvement in sports and psychological well-being;Snyder;Int. J. Sport Psychol.,1974
4. “Positive Addiction.”;Glasser,1976
5. Effect of increase in physical fitness on mental ability following physical and mental stress;Gutin;Res. Q.,1966