Estefan, Alberto, Alberto Beguiristain, José Praderi, Roberto Grezzi, and Ruben Esperón. “The Ligation in Echelon of hemorrhoids.: Experience of 100 Patients Operated Upon. Results”. Cirugía del Uruguay 55, no. 1 (April 10, 1985): 60–63. Accessed May 24, 2026. https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/3650.