Ozdemir, A., A. Sen, B. Erdivanli, V. Koksal, and A. Ozdemir. “Intraoperative Spinal Injection in a Morbidly Obese Patient”. Annals of Medical Research, vol. 21, no. 3, May 2021, pp. 0237-9, http://www.annalsmedres.org/index.php/aomr/article/view/1952.