Ahmed, Sajjad, Md Mozaffer Hossain, and UH Shahera Khatun. “Pre-Emptive Analgesia : Effect of Low Dose Ketamine As Pre-Emptive Analgesia in Postoperative Pain Management After Lower Abdominal Surgery”. Journal of the Bangladesh Society of Anaesthesiologists 17, no. 1 (February 27, 2014): 17–22. Accessed December 22, 2024. https://banglajol.info/index.php/JBSA/article/view/4046.