Rizvandi, A., F. Tojari, and Z. S. Zadeh. “Sport Consumer Behaviour Model: Motivators and Constraints”. Journal of Human Sport and Exercise, vol. 14, no. 5proc, Dec. 2019, pp. S2247-S2261, https://www.jhse.ua.es/article/view/2019-v14-n5-proc-sport-consumer-behaviour-model-motivators-const.