Angel Tapia-Serrano, Miguel, et al. “Systematic Review about the Effectiveness of Physical Activity Programs to Reduce Overweight and Obesity in School-Age Youth”. Revista De Psicología Del Deporte (Journal of Sport Psychology), vol. 29, no. 2, Sept. 2020, pp. 83–91, https://mail.rpd-online.com/index.php/rpd/article/view/14.