Manzano-Pérez , A, and A Serrano-Imedio. “PELVIC FLOOR STRENGTHENING IN NON-SPECIFIC LUMBOPELVIC PAIN. YSTEMATIC REVIEW AND META-ANALYSIS”. Cuestiones De Fisioterapia, vol. 47, no. 3, June 2018, pp. 49-57, http://cuestionesdefisioterapia.es/index.php/cf/article/view/164.