1. Bilateral cutaneous sinus tracts of dental etiology: report of case;Sahamoto;J Oral Surg,1973
2. A draining sinus tract of the chin: report of case;Gorsky;Oral Surg,1978
3. Chronic dental fistule on the nose;Tagami;Acta Derm Venereol (Stockh),1977
4. Chronic draining extraoral fistula of 32 years' duration;Bernick;Oral Surg,1969
5. Textbook or Oral Surgery;Kruger,1979