Waseem, Muhammad, et al. “OUTCOMES OF PATIENTS WITH POOR LEFT VENTRICULAR FUNCTION IN OFF PUMP (OPCAB) AND ON PUMP(CCAB) CORONARY ARTERY BYPASS GRAFTING”. Pakistan Armed Forces Medical Journal, vol. 66, no. SUPPL-1, Mar. 2022, pp. S1-6, https://pafmj.org/PAFMJ/article/view/8318.