Valdivia-Moral, P. A., Fernández-Revelles, A. B., Muros-Molina, J. J., & Chacón-Cuberos, R. (2018). Effectiveness indices evaluating time in physical education: Example in Motor Games. Journal of Human Sport and Exercise, 13(2proc), S529-S540. https://doi.org/10.14198/jhse.2018.13.Proc2.36