1. Velopharyngeal incompetence;David,1990
2. Complications following posterior pharyngeal flap surgery;Graham;Cleft Palate J,1973
3. Velopharyngeal synechiae with various pharyngeal flaps;Millard,1980
4. Correction of lateral port stenosis following a pharyngeal flapoperation;Hoffman;Cleft Palate J,1985
5. Simultaneous posterior flap and tonsillectomy;Reath;Cleft Palate J,1987