Awolola, Eniola, et al. “Efficacy of Pulmonary Exercise Administered in Supine, 45°, or 90° Long Sitting Position on Cardiopulmonary Parameters and Quality of Life of Patients With Chronic Obstructive Pulmonary Disease: A Randomized Control Trial Study Protocol”. Nigerian Journal of Chest Diseases, vol. 3, no. 1, Sept. 2025, pp. 33-47, https://doi.org/10.82222/njcd.vol3no1.41.