1. E. Mazanek and S. Jasienska:JISI, 1963, vol. 201, pp. 60–67.
2. C. Price and D. Wasse: Dev. Ironmaking Pract., Proc. Conf., 1972, Iton Steel Inst., London, 1973, pp. 32-52.
3. N. L. Zhilo, II. Sagaidak, L. Ya. Shparker, L. I. Bolshakova, and A. G. Rusakova:Stal in English, 1966, no. 4, pp. 252–57.
4. H. Lvova and O. Cejchan:Huin. Listy, 1976, vol. 31, no. 8, pp. 541–47 (BISI Translation no. 16208).
5. H.W. Gerling: Dr. Ing. Dissertation, Tech. Univ. of Clausthal, Clausthal, 1973.