Mañana, J. and Guicheff, V. (1972) “Conservative treatment of coccyx fistulas and some perianals”, Cirugía del Uruguay, 42(6), pp. 400–402. Available at: https://replica-revista.scu.org.uy/index.php/cir_urug/article/view/2287 (Accessed: 14 June 2026).