Campos Vázquez, M. Ángel, Casamichana Gómez, D., Suárez Arrones, L., González Jurado, J. A., Toscano Bendala, F. J., & León Prados, J. A. (2017). Medium-sided games in soccer: Physical and heart rate demands throughout successive working periods. Journal of Human Sport and Exercise, 12(1), 129–141. https://doi.org/10.14198/jhse.2017.121.11