Reverter Masià, Joaquín, et al. “Actividad físico-Deportiva Extraescolar En Alumnos De Primaria: El Caso De Torrevieja (Alicante) (Extracurricular Physical and Sports Activities in Elementary Students: The Case of Torrevieja (Alicante))”. Retos, vol. 25, Jan. 2014, pp. 48-52, https://doi.org/10.47197/retos.v0i25.34476.