Khar, M. N., Kausar, R., Akbar, R., Khan, M. R. I., Huda, N. U., Yousaf, G. and Faisal, S. (2024) “Effects of Acapella versus Blow Bottle Positive Expiratory Pressure on Airway Clearance and Peak Expiratory Flow Rate in Post-Covid-19 Patients”, Journal of Health and Rehabilitation Research, 4(1), pp. 161–166. doi: 10.61919/jhrr.v4i1.355.