1. A rare case of duplicitas anterior: a female infant with two mouths and two pituitaries;Bacsich;Journal of Anatomy,1964
2. A report of a case of an unusual embryologic defect of the face;Beaty;Plastic and Reconstructive Surgery,1956
3. An accessory mouth Case report;Borcbakan;Plastic and Reconstructive Surgery,1978
4. Reduplication of the mouth and mandible;Davies;British Journal of Plastic Surgery,1973
5. Reduplication of mouth, tongue and mandible;McLaughlin;British Journal of Plastic Surgery,1948