Berrudez Villegas, Jorge, and Emil Kamaid. “Anal Fissure: Diagnostic and Therapeutic Considerations With Special Reference to Internal Lateral Sphincterotomy”. Cirugía del Uruguay 52, no. 1 (March 26, 1982): 19–23. Accessed March 28, 2026. https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/3266.