1. Lip positions and incisor relationships;Jackson;Br Dent J,1962
2. Lip posture and its significance in treatment planning;Burstone;Am J Orthod,1967
3. An analysis of facial contour in three dimensions in the dentulous individual and in the edentulous individual for whom complete dentures have been fabricated;Schwartz,1967
4. Esthetics and the aging face: an orthodontic myth;Peck;J Mass Dent Soc,1972
5. An esthetic evaluation of lip-teeth relationships present in the smile;Hulsey;Am J Orthod,1970