Villegas-Amigo , S, et al. “Effectiveness of an Exercise Program Combined With Other Physiotherapy Interventions in Patients With Non-Specific Lower Pain: A Pilot Study”. Cuestiones De Fisioterapia, vol. 53, no. 02, July 2024, pp. 57-63, http://cuestionesdefisioterapia.es/index.php/cf/article/view/10.