Rodríguez, Gerardo M., Camilo S. Canesín, and Analía M. Prieto. “Villar’s Nodule: A Rare Cause of Umbilical Nodule”. Revista Argentina de Cirugía 113, no. 3 (August 27, 2021): 371–374. Accessed January 19, 2025. https://revista.aac.org.ar/index.php/RevArgentCirug/article/view/349.