Variability of disk position in asymptomatic volunteers and patients with internal derangements of the TMJ. - Rammelsberg,P.; Pospiech,P.; Jäger,L.; Pho-Duc,J.M.; Böhm,A.O.; Gernet,W. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 1997)