1. 1) S.Nishizawa: Tekkoukai, 51 (2001), 4.
2. 3) L.Bogdandy and H.J.Engel: Die Reduktion der Eizenerze (1967), p. 99.
3. Quantitative Estimation of Coupling Phenomenon between Reduction and Gasification on the Facing Pair of Iron Oxide and Graphite
4. 5) C.Takano, M.B.Mourao, J.C.D'Abreu, H.Kohler, M.A.Contrucci, P.H.C.Costa, E.S.Marcheze and N.Jacomini: 1998, ICSTI/Ironmaking Conf. Proceedings, p. 1559.