Here are a few vibration related studies:
Bosco, C. : Líeffetto della vibrazione sulla forza muscolare e sul profile ormonale in atleti; Atleticastudi, No. 4/5/6, 1998, pg. 7-14.
Bosco, C.; Cardinale, M.: Nuove frontiere dellí allenamento sportive : le vibrazioni. Effetti sul comportamento meccanico del musculo scheletrico. Coaching and Sport Science Journal, Vol. 3., No.1., 1998, pg. 53-59.
Bosco, C.; Cardinale, M.; Tsarpela, O.; Colli, R.; Tihanyi, J.; von Duvillard, S.P.; Viru, A. : The influence of whole body vibration on jumping performance; Biology of Sport, Vol. 15., No. 3., 1998, pg. 157-164.
Bosco, C.; Cardinale, M.; Tsarpela, O.: Influence of vibration on mechanical power and electromyogram activity in human arm flexor muscles; Eur. J. Appl. Physiol. Vol. 79., 1999, pg. 306-311.
Bosco, C.; Colli, R.; Introini, E.; Tsarpela, O.; Madella, A.; Tihanyi, J.; Viru, A. : Adaptive responses of human skeletal muscle to vibration exposure; Clin. Physiol. Vol. 19., No. 2., 1999, pg. 183-187
Bosco, C.; Colli, R.; Cardinale, M.; Tsarpela, O.; Bonifazi, M. : The effect of whole body vibration on mechanical behaviour of skeletal muscle and hormonal profile; In : Lyritis,G. (Red.) : Musculo-Skeletal Interactions, Vol. 2., Hylonome Editions, Hellenic Institute of Osteoporosis, Griekenland.
There is also a write up in NSIA which i will dig out later.