Anshel, M. and Weinberg, R. (1995) Sources of acute stress in American and Australian basketball referees. Journal of Applied Sport Psychology, 7: 11-22.
Fry, D. and Soften, J. (1992) Perceived stressors for soccer and volleyball officials from three rating levels. Journal of Sports Behavior, 30: 3-20.
Goldsmith, P. and Williams, J. (1992) Perceived stressors for football and volleyball officials from three rating levels. Journal of Sport Behavior, 15: 106-118.