Mamchich, V. I., and M. A. Chaika. “Classification of Acute Cholecystitis:Etiopathogenetic Principles of Construction”. Herald of Pancreatic Club 44, no. 3 (July 16, 2019): 70-78. Accessed March 29, 2024. https://vkp.org.ua/index.php/journal/article/view/169.