Mandal, Naresh Chandra, et al. “Early Post Operative Pain Management and Early Extubation After Off-Pump Coronary Artery Bypass Graft Surgery Is Better Managed With Thoracic Epidural Analgesia”. Cardiovascular Journal, vol. 9, no. 2, May 2017, pp. 142-6, doi:10.3329/cardio.v9i2.32427.