Khakurel, Gita, Kalyan Gautam, and Sanat Chalise. “Diurnal Variability of Peak Expiratory Flow Rate in Healthy Adult Employees of a Medical College of Kathmandu”. Journal of Institute of Medicine Nepal 43, no. 1 (April 30, 2021): 15–18. Accessed September 20, 2021. https://www.nepjol.info/index.php/JIOM/article/view/37466.