1. Median Fraenum of Upper Lip and Its Influence on Spacing of Upper Central Incisor Teeth;Tait;New Zealand D. J.,1929
2. Oral Histology and Embryology;Orban,1944
3. Study of Frenum Labii Superioris;Coleman;Sch. of Dent. Alum. Bull. U. Mich.,1941
4. Frenum Labium and Its Relation to Intermaxillary Suture;Ketcham;Am. Orthodontist,1907
5. Dentofacial Musculature;Dewel;Am. J. Orthodontics,1941