1. J. H. Little, T. J. Queen, and I. M. Mackenzie:Electroslag Refining, pp. 43–53, The Iron and Steel Institute, London, 1973.
2. G. E. Forsythe and W. R. Wasow:Finite Difference Methods for Partial Differential Equations, John Wiley, New York, 1967.
3. B. Patrick: unpublished research, British Steel Corporation, Teesside Labora- tory, 1978.
4. W. H. McAdams:Heat Transmission, 3rd ed., McGraw-Hill, New York, 1954.
5. V. L. Shevstov, L. V. Chekotilo, B. I. Medovar, G. S. Marinskii, and V. P. Serdyukova:Stal, 1974, no. 7, pp. 608-10.