Aryal, Nirjala, Arun Kumar Neopane, Moon Thapa, Umesh Kumar Singh, and Keshav Agrawal. 2013. “Crystalline Penicillin for Community Acquired Pneumonia: Does It Still Work?”. Medical Journal of Shree Birendra Hospital 11 (2):36-39. https://nepjol.info/index.php/MJSBH/article/view/7908.