Sravya, Ravela Lakshmi, Soumya Samal, Sumita Swain, and Bikash Parida. “Role of Preoperative Arterial Blood Gas Analysis in American Society of Anesthesiologists Grade III and IV Patients in a Tertiary Care Hospital”. AL-Kindy College Medical Journal 20, no. 2 (August 1, 2024): 106–110. Accessed April 3, 2025. https://jkmc.uobaghdad.edu.iq/index.php/MEDICAL/article/view/1249.