González Pieri, Manuel, Melissa Castellanos, and Wenndy Umanzor. “Cobra Head Sign: In Relation to Ureterocele and Vesical Calculus”. Revista Científica de la Escuela Universitaria de las Ciencias de la Salud 7, no. 2 (November 12, 2021): 63–64. Accessed October 19, 2024. https://camjol.info/index.php/RCEUCS/article/view/12630.