Verma, Laxman, Pankaj Kumar Chaudhary, Chandresh Gupta, and Umesh Saroj. “A Comparative Study of Tapentadol Versus Tramadol in the Treatment of Low Back Pain”. International Journal of Basic & Clinical Pharmacology 9, no. 7 (June 26, 2020): 1064–1068. Accessed December 4, 2023. https://www.ijbcp.com/index.php/ijbcp/article/view/4048.