A.A. Tursumetov, T.A. Askarov, H.M. Jafarov, Z.Z. Tukhtamurod,. 2020. “The Choice Of The Operation Method For Combined Ulcer Of Gaster And Duodenum”. International Journal of Advanced Science and Technology 29 (11s), 3140-46. http://sersc.org/journals/index.php/IJAST/article/view/23834.