Spaniol, F. J. Julkaisussa Strength and Conditioning Journal (2012)
Junge, A., Langevoort, G., Pipe, A., Peytavin, A., Wong, F., Mountjoy, M., Beltrami, G., Terrell, R., Holzgraefe, M., Charles, R., Dvorak, J. Julkaisussa The American Journal of Sports Medicine (2005)