Reverter Masia, Joaquín, et al. “La competición Deportiva Como Medio De enseñanza En Los Centros Educativos De Primaria (The Competition Sport As a Way of Education in the Primary Educational Institutions)”. Retos, vol. 16, July 2009, pp. 5-8, https://doi.org/10.47197/retos.v0i16.34708.