KHAN, A. N.; KHAN, M. A.; ALI, M. M. Sonographic Diagnosis of Gastrointestinal Diseases in the Adult. Journal of Postgraduate Medical Institute, [S. l.], v. 8, n. 1, 2011. Disponível em: https://www.jpmi.org.pk/index.php/jpmi/article/view/440. Acesso em: 28 may. 2024.