Aryal, N., Neopane, A. K., Thapa, M., Singh, U. K., & Agrawal, K. (2013). Crystalline Penicillin for Community Acquired Pneumonia: Does it still work?. Medical Journal of Shree Birendra Hospital, 11(2), 36–39. https://doi.org/10.3126/mjsbh.v11i2.7908