Singh, Jeevan, Alex Tandukar, and Kalpana Kharbuja. “Comparison of the Single Breath Vital Capacity Technique With the Tidal Volume Technique”. Journal of Nepal Paediatric Society 38, no. 2 (January 11, 2019): 84-89. Accessed November 22, 2019. https://www.nepjol.info/index.php/JNPS/article/view/20145.