M. Ahmad, A. Iqbal, V. I. Paracha, A. Rashid, and A. Rashid, “ROLE OF POSTERIOR PERICARDIOTOMY IN PREVENTION OF PERICARDIAL EFFUSION AND ATRIAL FIBRILLATION AFTER CORONARY ARTERY BYPASS GRAFTING SURGERY”, PAFMJ, vol. 61, no. 1, Mar. 2011.