1. Preparation areas resisting displacement of artificial crowns;Hegdahl;J Oral Rehabil,1977
2. Fundamentals of tooth preparations for cast metal and porcelain restorations;Shillingburg,1987
3. Factors that influence the mechanical retention of the complete crown;Zuckerman;Int J Prosthodont,1988
4. Resistance form for the complete veneer crown Principles of design and analysis;Zuckerman;Int J Prosthodont,1988
5. Quantitative determination of taper adequate to provide resistance form: Concept of limiting taper;Parker;J Prosthet Dent,1988