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2. B. B. Kudryashov, A. N. Salamatin, and V. K. Chistyakov, ?Analysis of the heat and mass transfer in fusional column boring of shafts,? in: Antarctica, Commission Proceedings [in Russian], Nauka, Moscow (1979), No. 18, pp. 106?112.
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4. H. N. Fisher, ?Thermal analysis of some subterrene penetrators,? Trans. ASME, Ser. C,98, No. 3, 485?490 (1976).
5. A. A. Erokhin, Principles of Fusional Welding [in Russian], Mashinostroenie, Moscow (1973).