M. O. Sigler, J. Stein, R. Zuker: A rare craniofacial cleft: numbers 7, 2, and 3 clefts accompanied by a single median lip pit. In: The Cleft palate-craniofacial journal: official publication of the American Cleft Palate-Craniofacial Association, Mai 2004, Band 41, Nr. 3, S. 327–331; doi:10.1597/02-127.1, PMID 15151449.
M. O. Sigler, J. Stein, R. Zuker: A rare craniofacial cleft: numbers 7, 2, and 3 clefts accompanied by a single median lip pit. In: The Cleft palate-craniofacial journal: official publication of the American Cleft Palate-Craniofacial Association, Mai 2004, Band 41, Nr. 3, S. 327–331; doi:10.1597/02-127.1, PMID 15151449.