Dildar, Jalal, Hamza Munir, Aman Ullah, Asimullah Khan, Fauzia Aitazaz, and Mohsin Ali. “FREQUENCY OF TYPE-II RESPIRATORY FAILURE IN CHRONIC OBSTRUCTIVE PULMONARY DISEASE”. Pakistan Journal of Physiology 20, no. 1 (March 31, 2024): 33–36. Accessed July 21, 2024. https://pjp.pps.org.pk/index.php/PJP/article/view/1627.