Tarigan, A. P., L. Agustin, . Zulkarnain, . Maryaningsih, A. H. Tarigan, A. Pradana, P. Pandia, . Egipson, M. Simatupang, and P. Eyanoer. “Change of VO2 Max and Muscle Mass After One-Month and Two-Month Upper and Lower Body Exercises in Stable Chronic Obstructive Pulmonary Disease”. Acta Medica Bulgarica 52, no. 3 (September 2, 2025): 32–37. Accessed March 13, 2026. https://journals.mu-sofia.bg/index.php/amb/article/view/483.