1. A.W. Cramb: in Impurities in Engineering Materials, C.L. Briant, ed., Marcel Dekker, New York, NY, 1999, pp. 49–89.
2. G.J.W. Kor: Proc. First Int. Calcium Treatment Symp., The Institute of Metals, London, U.K., 1988, pp. 39-44.
3. N. Verma, M. Lind, P.C. Pistorius, R.J. Fruehan, and M. Potter: Iron Steel Tech., 2010, vol. 7, no. 7, pp. 189-97.
4. G.M. Faulring, J.W. Farrell, and D.C. Hilty: Iron Steelmaker, 1980, vol. 7, no. 2, pp. 14-20.
5. B. Deo and R. Boom: Fundamentals of Steelmaking Metallurgy, Prentice Hall International, Hemel Hempstead, U.K., 1993, pp. 265-69.