@article{articleb0386c0b, title = {Pursed lip breathing improves exercise tolerance in COPD: a randomized crossover study}, author = {Cabral, L. F. and D'Elia, T. da Cunha and Marins, D. de Sousa and Zin, W. Araujo and GuimarĂ£es, Francisco Silveira}, year = {2015}, journal = {European Journal of Physical and Rehabilitation Medicine} }