Ahmad, H., Justine, M., Othman, Z., Mohan, V. and Mirza, F. (2013) “The Outcomes of Short Term Inspiratory Muscle Training (IMT) Combined with Chest Physiotherapy in Hospitalized COPD Patients”, Bangladesh Journal of Medical Science, 12(4), pp. 398–404. doi: 10.3329/bjms.v12i4.13302.