Hespanhol, J. E., M. de Arruda, M. A. Cossio-Bolaños, and R. Vargas Vitoria. “Assessment of Explosive Strength As a Function of Chronological Age in Young Volleyball Women”. Revista Ciencias De La Actividad Física UCM, Vol. 12, no. 12, Dec. 2011, pp. 7-13, http://200.9.234.116/index.php/revistacaf/article/view/1172.