-Rehman, . N.- ur, S. . khan, M. . Zubair, M. ul . Haq, and U. . Badshah. “Causes, Morbidity, and Mortality of Upper Gastrointestinal Bleeding Among Hospitalized Patients”. BMC Journal of Medical Sciences, vol. 5, no. 1, July 2024, pp. 55-58, doi:10.70905/bmcj.05.01.0269.