“Cardiac Drugs Requirement during Off-Pump Coronary Artery Bypass (OPCAB) Surgery- A Comparison between Combined High Thoracic Epidural Anaesthesia (HTEA) with GA and GA Alone”, Cardiovasc. j., vol. 3, no. 1, pp. 7–10, Nov. 2010, doi: 10.3329/cardio.v3i1.6420.