Islam, SM Rafiqul, Hasina Begum, Md Mustafa Kamal, Md Shah Alam Bhuiyan, and UH Shahera Khatun. “Effects of Ketamine Hydrochloride (preservative Free) and Fentanyl Citrate Added to Low Dose Hyperbaric Bupivacaine for Sub-Arachnoid Block in Lower Uterine Caesarian Section – a Comperative Study”. Journal of the Bangladesh Society of Anaesthesiologists 24, no. 2 (August 2, 2014): 53–59. Accessed October 1, 2022. https://banglajol.info/index.php/JBSA/article/view/19802.