1. J.-W. Noh, E.-P. Kim, H.-S. Song, W.-H. Baek, K.-S. Churn, and S.-J.L. Kang:Metall. Trans. A, 1993, vol. 24A, pp. 2411–16.
2. B.H. Rabin, A. Bose, and R.M. German:Int. J. Powder Metall., 1989, vol. 25, pp. 21–27.
3. J.B. Posthill, M.C. Hogwood, and D.V. Edmonds:Powder Metall., 1986, vol. 29, pp. 45–51.
4. B.H. Rabin and R.M. German:Metall. Trans. A, 1985, vol. 19A, pp. 1523–32.
5. K.S. Churn, J.W. Noh, H.S. Song, E.P. Kim, S. Lee, and W.H. Baek:’92 Intr. Conf. on Tungsten and Tungsten Alloys, MPIF, New Jersey, 1992, pp. 397–405.