Yadav, T. (2021) “A study to evaluate the efficacy of instillation of ropivacaine with tramadol through surgical drains for post-operative analgesia in patients undergoing mastectomy”, Asian Journal of Medical Sciences, 12(6), pp. 23–28. Available at: https://nepjol.info/index.php/AJMS/article/view/34795 (Accessed: 6 December 2025).