AMIR, Muhammad; HAFEEZ, Sarah; ADREES, Muhammad; NAZIR, Amir; ATHER, Hafiz Mughees. Causes of Upper Gastrointestinal Bleeding on Endoscopy in Tertiary Care Hospital. Annals of Punjab Medical College, [S. l.], v. 14, n. 3, p. 263–267, 2020. DOI: 10.29054/apmc/2020.695. Disponível em: https://apmcfmu.com/index.php/apmc/article/view/695. Acesso em: 2 mar. 2026.