da Silva de Paula, C.R. et al. 2022. Effects of two different inspiratory muscle training devices on respiratory muscle strength, cardiopulmonary functional capacity, and quality of life of COPD patients. Manual Therapy, Posturology & Rehabilitation Journal. 20, (Jun. 2022). DOI:https://doi.org/10.17784/mtprehabjournal.2022.20.1222.