Holguín-Ramírez, J., G. Gastélum-Cuadras, M. Cervantes-Borunda, Y. Reyes-Acosta, A. Ramos-Jiménez, and R. Hernández-Torres. “Use of Mindfulness on Indicators of Stress in Athletes During the Competitive Stage:”. Revista Ciencias De La Actividad Física UCM, Vol. 21, no. 2, Aug. 2020, pp. 1-13, doi:https://doi.org/10.29035/rcaf.21.2.2.