Pereira Brun M, Caña Pino A, Apolo Arenas MD. POSITIVE EXPIRATORY PRESSURE TECHNIQUES (PEP) IN CYSTIC FIBROSIS. BIBLIOGRAPHIC REVIEW. CDF. 2018;47(2):131-141. Accessed October 22, 2024. http://cuestionesdefisioterapia.es/index.php/cf/article/view/174