R. Sharma, A. Kaur, M. Gupta, A. Kaur, H. Arora, and S. Singh, “A Cross Sectional Study to Assess Peak Expiratory Flow Rate in Healthy School Children for Establishment of Normative Data”, J. Nepal Paedtr. Soc., vol. 40, no. 1, pp. 1–6, Aug. 2020.