Reference power values for the jump squat exercise in elite athletes: A multicenter study - Valenzuela, P. L.; McGuigan, M.; Sánchez-Martínez, G.; Torrontegi, E.; Vázquez-Carrión, J.; Montalvo, Z.; Abad, C. C. C.; Pereira, L. A.; Loturco, I. (Journal of Sports Sciences, 2020)