[1]
A. Valenzuela, N. Ricciardi, M. Montero, V. Tchekmedyian, H. Geninazzi, and C. Aguirre, “Pharyngo - esophageal diverticulum.: systematization of Diagnostic and Therapeutic Study”, Cir. Urug., vol. 50, no. 5, pp. 409–411, Mar. 1980.