1. O.K. Mehra, D.K. Bose, C.K. Gupta, Trans. IIM 4, 1–7 (1973)
2. R. Gedam, Miner. Metals Rev. 22(4), 11–24 (1996)
3. S. Mohan Rao, P.V.T. Rao, B.B. Sinha, in Proceedings of Seminar `Ferro-Alloys Present and Future’, 5–6 May 1995, Jamshedpur, pp I.1–I.25
4. P.M. Prasad, T.R. Mankhand, Trans. IIM 32(3), 253–285 (1979)
5. S. Singh, M.K. Chetty, J.M. Juneja, J.C. Sehra, C.K. gupta, Minerals engineering, vol. l, no. 4, pp. 337–342, 1988 Printed in Great Britain. (references)