1. 1F. H. Norton , Refractories , 3d ed. Ch. V, pp.; 76 -93 . Ceram.Abstracts, 1950 , July, 76 .
2. 2A. Schack, Goldschmidt, P. Everett, and Partridge , Industrial Heat Transfer , translated by. John Wiley & Sons, Inc., New York, 1933 . 371 pp.; Ceram.Abstracts, 13 [3 ] 371 (1933 ).