1. G. R. Fitterer et al.: Acid Open Hearth Slag Fluidity and Its Significance. Bulletin No. 1, Acid Open Hearth Research Association, Inc., Pittsburgh (1945).
2. G. R. Fitterer: Trans. ASM (1945) 34, p. 1.
3. P. Herasymenko: Journal Iron and Steel Inst. (1947) 157, p. 515.
4. C. A. Bruch: Oxidizing Characteristics of Acid Open Hearth Slags. Ph.D. Thesis, 1952. Univ. of Pittsburgh.
5. G. R. Fitterer: Proc. Electric Furnace Steel Committee, AIME (1946) 4, pp. 185–198.