Muhammad Zain, Mukhtiar Ahmad, Sehar Saif, Nimra Zulfiqar, Zeenat Shaheen, Adan Amjad, and Imad Ud Din. “Pharmacological Comparison of Ketamine and Tramadol for Prevention of Shivering During Spinal Anesthesia”. Journal of Health, Wellness and Community Research (May 23, 2025): e262. Accessed August 24, 2025. https://jhwcr.com/index.php/jhwcr/article/view/262.