1. Properties of Glasses in the System CaO-B2O3-Al2O3: I;Owen;Phys. Chem. Glasses,1961
2. Structure of Glass in the System K2O-B2O3-Al2O3;Beekenkamp;ibid.,1968
3. Fundamental Condition of Glass Formation;Sun;J. Amer. Ceram. Soc.,1947
4. The Binary Systems of Alumina with Silica, Lime and Magnesia;Shepherd;Amer. J. Sci.,1909
5. 5 Kuan-Han Sun , “Aluminate and Beryllioaluminate Glasses,” U. S. Pat. 2,466,508, April 5, 1949.