Ali, A. ., I. . Khalilullah, D. . Das, M. A. . Hoque, B. . Das, M. T. . Hasan, R. H. . Khan, and K. . Ibrahim. “Comparative Study Between Tramadol Hydrochloride and Pethidine for Control of Shivering Under Regional Anaesthesia in Obstetric Patients”. Journal of the Bangladesh Society of Anaesthesiologists, vol. 32, no. 2, July 2019, pp. 77-82, doi:10.3329/jbsa.v32i2.66865.