1. In vivo and in vitro wear of potential posterior composites;Lutz;J Dent Res,1984
2. The radiopacity of composite restorative materials;Goshima;Dentomaxillofac Radiol,1985
3. Die Röntgenopazität von Komposietmaterialien und Zahnhartsubstanzen;Hein;Dtsch Zahnärtzl Z,1989
4. Status report on posterior composites;J Am Dent Assoc,1983
5. Revised guidelines for submission of composite resin materials for occlusal Class I and Class II restorations,1984