1. Resonance disorders and velopharyngeal function;Kummer,2014
2. Speech evaluation of velopharyngeal dysfunction;Smith;J Craniofac Surg,2007
3. Coming to terms with VPI: a response to Loney and Bloem;Trost-Cardamone;Cleft Palate J,1989
4. Velopharyngeal dysfunction: recommendations for use of nomenclature;Loney;Cleft Palate J,1987
5. Velopharyngeal nomenclature: incompetence, inadequacy, insufficiency, and dysfunction;Folkins;Cleft Palate J,1988