Athar, M., U. Zubair, and B. Ahmed. “IMPACT OF PROPER METERED DOSE INHALER TECHNIQUE OVER PEAK EXPIRATORY FLOW RATE IN MODERATE PERSISTENT BRONCHIAL ASTHMA”. Pakistan Armed Forces Medical Journal, Vol. 68, no. 4, Aug. 2018, pp. 975-79, https://pafmj.org/index.php/PAFMJ/article/view/58.