Karim, M. R., T. Ahmed, S. Moinuddin, T. A. Chowdhury, and M. R. Khan. “Atrial Fibrillation After Coronary Artery Bypass Surgery With and Without Cardiopulmonary Bypass”. Cardiovascular Journal, vol. 10, no. 2, Apr. 2018, pp. 171-9, doi:10.3329/cardio.v10i2.36288.