Torrella ErELTlCeS, J. V., et al. , translators. “CERVICALGIA TENSIONED. I AM A STUDENT COMPARATIVE OF THE INSTABILITY OF THE CERVICAL SPINE, DESCENDED SHOULDER, AND CERVICAL STIFFENING”. Cuestiones De Fisioterapia, vol. 9, no. 1, June 1998, pp. 36-43, https://cuestionesdefisioterapia.com/index.php/es/article/view/555.