Gieremek, K., Saulicz, E., Pilat, A., & Molicka, D. (2003). Efficacy of the cervical extension vibrating apparatus in the treatment of patients with cervical spondylosis. Cuestiones De Fisioterapia, 22(1), 27-34. http://cuestionesdefisioterapia.es/index.php/cf/article/view/420