KAWALEC-RUTKOWSKA, A. M. Ultrasonographic features of pediatric umbilical hernias ‒ associations with age, sex, and hernial orifice width. European Journal of Clinical and Experimental Medicine, [S. l.], 2026. DOI: 10.15584/ejcem.2026.2.8. Disponível em: https://journals.ur.edu.pl/ejcem/article/view/12650. Acesso em: 27 feb. 2026.