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3. High-strength porcelain bonded restoration: anterior and posterior;Calamia;Quintessence Int,1989
4. The influence of different cementation modes on the fracture resistance of feldspathic ceramic crowns;Groten;Int J Prosthodont,1997
5. Fracture resistance of human enamel and three all-ceramic crown systems on extracted teeth;Scherrer;Int J Prosthodont,1996