Makhmanazarov O.M., and Khusenov I.Kh. “FACTORS IN BLEEDING FROM GASTRIC AND DUODENAL ULCERS. ”. Ta’lim Innovatsiyasi Va Integratsiyasi, vol. 38, no. 2, Feb. 2025, pp. 280-3, https://journal-web.uz/index.php/06/article/view/845.