1. Placement and replacement of composite restorations in Germany;Friedl;Oper Dent,1995
2. Placement and replacement of resin-based composite restorations in Italy;Mjør;Oper Dent,1992
3. Frequency of secondary caries at various anatomical locations;Mjør;Oper Dent,1985
4. Marginal failures of amalgam and composite restorations;Mjør;J Dent,1997
5. The optimum level of radiopacity in posterior composite resins;Goshima;Dentomaxillofac Radiol,1989