Di Domenico, F., I. Sannicandro, and G. Altavilla. “The Educational Value of the Rules in Five-a-Side Football”. Journal of Human Sport and Exercise, vol. 15, no. 3proc, Sept. 2020, pp. S645-S655, https://www.jhse.ua.es/article/view/2020-v15-n3-proc-educational-value-rules-five-a-side-football.