1. Spontaneous umbilical fistula in Crohn's disease. Report of a case;Burchell, M.C.;Dis Colon Rectum,1989
2. Enterocutaneous fistulas;Sternquist, J.C.; Burbrick, M.P.; Hitchcock, C.R.;Dis Colon Rectum,1978
3. Pseudomyxoma peritonea and umbilical fistula arising through an omphalocyst;Garay, G.; Mihalyi, L.;Radiologia Clinica et Biologica
4. Vesico-umbilical fistula due to the perviousness ofthe urachus;Bocchi, G.; Sirica, S.;QuaderniDi Radiologia
5. Spontaneous enterumbilical fistula;Ubhi, C.S.; Wenham, P.W.;Br Med J