AMK, Hasan, et al. “Bispectral Index Monitoring in Patients Undergoing Coronary Artery Bypass Grafting (CABG) under Cardiopulmonary Bypass”. Journal of the Bangladesh Society of Anaesthesiologists, vol. 32, no. 2, July 2019, pp. 60-64, doi:10.3329/jbsa.v32i2.66859.