Z. A. Sukhera, M. Z.- e-H. Mirza, R. Azam, I. Z. Gondal, A. M. Sukhera, and K. Arshad, “Left Ventricular Systolic Dysfunction in Patients of Obstructive Sleep Apnea Syndrome”, PAFMJ, vol. 73, no. 1, pp. 123–26, Feb. 2023.