Khan, Md Kutub Uddin, Md Abbas Uddin, Md Aftab Uddin, and Wahida Rakinur Rab. “Thoracic Segmental Spinal Anesthesia in Patient With Severe COPD in Open Cholecystectomy”. Central Medical College Journal 6, no. 2 (June 19, 2023): 97–100. Accessed August 16, 2024. https://banglajol.info/index.php/CeMeCJ/article/view/67075.