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[2] BABICH,A.,SENK,D., GUDENAU, H.W., MAVROMMATIS, K.TH. IRONMAKING. Textbook, RWTH Aachen University, Aachen 2008, 402 p. ISBN 386-13-0997-1.
[3] FRUEHAN, R. J.The Making, Shaping and Treating of Steel, AISE Steel Foundation, 1998, 767 p. ISBN 0-930767-02-0.
[4] STOLTE, G. Secondary Metallurgy-Fundamentals, Processes, Aplications.StahlEisen Communications, germany, 2002, 216 p.,ISBN 978-3-514-00648-5.