Ullah, H., A. Ullah, R. Jan, S. Ayaz, I. Ullah, and M. Masoud. “Frequency of Coronary Artery Disease in Patients Undergoing Valvular Heart Surgery: A Retrospective Observational Study”. Pakistan Heart Journal, vol. 57, no. 1, Mar. 2024, pp. 52-56, doi:10.47144/phj.v57i1.2562.