1. Nasendoscopy: significant refinements of a direct-viewing technique of the velopharyngeal sphincter;David;Plastic and Reconstructive Surgery,1982
2. The use of injectable collagen to correct velopharyngeal insufficiency;Remacle;Laryngoscope,1990
3. Surgical treatment of borderline velopharyngeal insufficiency using homologous cartilage implantation with videonasopharyngoscopic monitoring;Trigos;Cleft Palate Journal,1988
4. Proplast as a pharyngeal wall implant to correct velopharyngeal insufficiency;Wolford;Cleft Palate Journal,1989