Hossain, M., M. Hoq, M. Rahman, S. Yeasmeen, A. Ahmed, M. Huda, and M. Rahman. “Vecuronium and Fentanyl Requirement in Abdominal Surgery under Combined Epidural-General Anaesthesia and General Anaesthesia Alone”. Mymensingh Medical Journal, vol. 21, no. 1, Nov. 2012, pp. 55-59, https://www.banglajol.info/index.php/MMJ/article/view/12512.