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2) I. PETRMAN : The Third Int. Symp. on Electroslag and Special Melting Technol., ed. by G. K. BHAT and A. SIMKOVICH (1971), p. 108 [Mellon Inst.]
3) 崔 亨燮, 徐 相煕, 崔 〓 : 大韓金属学会誌, 14(1976), p.129
4) M. C. FLEMINGS : Solidification Processing (1974), p. 148 [McGraw-Hill Book Co.]