1. Textbook of complete dentures;Rahn,1993
2. The glossary of prosthodontic terms;The Academy of Prosthodontics,1999
3. The bracing position, centric occlusion, and centric relation;Sheppard;J Prosthet Dent,1959
4. Physiologic vertical dimension and centric relation;Shanahan;J Prosthet Dent,1956