Pradenas Vargas, X., Campos García, M., Contreras Sepúlveda, M., Puentes Matus, D. and Luna Villouta, P. (2017) “Comparison of motor development in school aged children ages 9 and 10 in physical education classes and extracurricular sport workshops”, Revista Ciencias de la Actividad Física UCM, 18(2), pp. 1-8. doi: https://doi.org/10.29035/rcaf.18.2.1.