S. A. R. A. Shah, “Frequency of Respiratory Complications in Post COVID-19 Patients After Coronary Artery Bypass Grafting”, Pak Armed Forces Med J, vol. 72, no. SUPPL-3, pp. S561–64, Nov. 2022, doi: 10.51253/pafmj.v72iSUPPL-3.9553.