Toledo-Blanco , J R, C M Sanjuán-Agudo, M T Gómez-González, M Pérez-Ferreiro, D Valcárcel-Linares, I Lázaro-Navas, L López-González, and A Fernández-Ropero. 2021. “EFFICACY OF ULTRASOUND-GUIDED INTRAMUSCULAR ELECTROSTIMULATION IN CONJUNCTION WITH MOTOR CONTROL EXERCISES IN NON-SPECIFIC CHRONIC LOW BACK PAIN: A PILOT RANDOMIZED CLINICAL TRIAL”. Cuestiones De Fisioterapia 50 (3): 183-202. http://cuestionesdefisioterapia.es/index.php/cf/article/view/65.