Effect of a Self-directed and Supervised Pulmonary Rehabilitation Approach on Cough and Sputum Expectoration in Chronic Obstructive Pulmonary Disease. Reabilitacijos mokslai [Internet]. 2022 Nov. 16 [cited 2024 Apr. 28];2(27):98-108. Available from: https://journals.lsu.lt/reabilitacijos-mokslai/article/view/1266