Islam, Md Manowarul, et al. “Subarachnoid Block Versus General Anaesthesia for Laparoscopic Cholecystectomy-A Comparative Study”. Journal of Dhaka National Medical College & Hospital, vol. 21, no. 2, Sept. 2015, pp. 38-41, doi:10.3329/jdnmch.v21i2.77904.