Martínez-González , E, et al. “EFFECTIVENESS OF A DAILY EXERCISE PROGRAM AT HOME FOR STRENGTHENING OF LOWER LIMBS IN PATIENTS WITH MULTIPLE SCLEROSIS: A PILOT STUDY”. Cuestiones De Fisioterapia, vol. 47, no. 1, Feb. 2018, pp. 08-20, https://cuestionesdefisioterapia.es/index.php/cf/article/view/170.