Nepal, M., Paudel, R., Poudel, R., & Gautam, N. (2019). Analgesic Efficacy and Tolerability of Tramadol Versus Low Dose Tramadol-Paracetamol in Patients with Gastro Intestinal Surgery. Journal of Universal College of Medical Sciences, 7(2), 39–45. https://doi.org/10.3126/jucms.v7i2.27136