A. Rosa Guillamón, E. Garcia Canto, y P. J. Carrillo López, «Actividad física, condición física y autoconcepto en escolares de 8 a 12 años (Physical activity, physical fitness and self-concept in schoolchildren aged between 8 to 12 years old)», Retos, vol. 35, pp. 236–241, ene. 2019.