Puente Varona, A., G. Mejuto, G. Iturriaga, and J. Cámara. “Are Valid and Reliable Video Cameras High Definition a 300 Frames Per Second for the Measumerent of a Squat Jump?”. Revista Ciencias De La Actividad Física UCM, Vol. 12, no. 12, Dec. 2011, pp. 15-19, http://200.9.234.116/index.php/revistacaf/article/view/1173.