1. Anorectal rings in infancy; incidence and significance;Harris;Pediatrics,1954
2. Rectal stenosis in infancy;Zahorsky;Arch. Pediat.,1936
3. Congenital fibrous bands in the anorectal line, a possible etiologic factor in colic and constipation;Coleman;Texas State J. Med.,1948
4. Congenital anal stricture;Liburt;J. Pediat.,1949
5. Congenital anorectal stricture;Brown;J. Pediat.,1950