Usenko, A. Yu., I. M. Todurov, A. V. Perekhrestenko, A. I. Plegutsa, A. A. Kalashnikov, and S. V. Kosiukhno. “Sleeve Gastrectomy in the Treatment of Obesity”. Klinicheskaia khirurgiia0, no. 8 (September 7, 2017): 5-7. Accessed January 21, 2020. https://hirurgiya.com.ua/index.php/journal/article/view/190.