Grzella, Jörg; Sturm, Peter; Krüger, Joachim; Reuter, Markus A.; Kögler, Carina; Probst, Thomas (2005). "Metallurgical Furnaces"(PDF) (بالإنجليزية). John Wiley & Sons. p. 7. Archived from the original(PDF) on 2017-01-10.
Grzella, Jörg; Sturm, Peter; Krüger, Joachim; Reuter, Markus A.; Kögler, Carina; Probst, Thomas (2005). "Metallurgical Furnaces"(PDF) (بالإنجليزية). John Wiley & Sons. p. 7. Archived from the original(PDF) on 2017-01-10.