Focal vibration of quadriceps muscle enhances leg power and decreases knee joint laxity in female volleyball players - Brunetti, O.; Botti, F. M.; Roscini, M.; Brunetti, A.; Panichi, R.; Filippi, G. M.; Biscarini, A.; Pettorossi, V. E. (The Journal of Sports Medicine and Physical Fitness, 2012)