1. Ackerman, C.A. (1981). The interaction model of anxiety empirically examined in a dental treatment situation. MA thesis, York University, Toronto.
2. When Kids compete for love, not fun;Andersonn;Perspective,1995
3. Competition: an introduction;Andrews;Riding,1985
4. Berner, U., (1982). The emotional balance of horse and rider. Dressage and CT, 19(7), 17–18;44.
5. Competitive anxiety in sport. Human kinetics.;Burton,1990