Shrestha, Sanjeet Krishna, et al. “Drug Susceptibility Pattern of Organisms Isolated During Acute Exacerbation of Chronic Obstructive Pulmonary Disease in a Tertiary Level Hospital of Nepal”. Medical Journal of Shree Birendra Hospital, vol. 15, no. 1, July 2016, pp. 43-51, https://nepjol.info/index.php/MJSBH/article/view/14945.