Kawalec-Rutkowska, Agata Maria. “Ultrasonographic Features of Pediatric Umbilical Hernias ‒ Associations With Age, Sex, and Hernial Orifice Width”. European Journal of Clinical and Experimental Medicine 24, no. 2 (June 25, 2026): 282–288. Accessed August 6, 2026. https://journals.ur.edu.pl/ejcem/article/view/12650.