1. Armitage P (1985). Statistical methods in medical research. Oxford: Blackwell, pp. 350–356.
2. Claus H (1981). The importance of leucite in dental porcelain. Translated by Michael D St. John, Vita Zahnfabrik. Bad Såckingen, Germany: H. Rauter GmbH and Co. KG.
3. Effectiveness of porcelain repair systems;Highton;J Prosthet Dent,1979
4. Tensile bond strength of new adhesive systems to In-Ceram ceramic;Kern;J Dent Res,1993
5. Tin oxide coating of aluminous porcelain by reactive ion plating;McCrory;J Dent,1991