8H. J.Oklowski and J.Marpuis.Lead Replacement in Dinnerware Glazes.Jour American Ceramic Society, 1985,343-357.
9J.E.Marguis,R.A.Eppler,Lead-less Glazes for Dinnerware. Ceramic Bulletin, 1994,443-445.
10G.J.Hristensen. The use of porcelain-fused-to-metal restorations in current dental practice: a survey. Journal of Prosthetic Dentistry. 1986, P56: 1 - 3.
