Dilshodbek Mamadaliyevich Khakimov, et al. “Comparative Analysis Of The Results Of The Endoscopic Treatment Of Gastroduodenal Ulcerative Bleeding”. The American Journal of Medical Sciences and Pharmaceutical Research, vol. 3, no. 04, Apr. 2021, pp. 17-25, doi:10.37547/TAJMSPR/Volume03Issue04-02.