1. J.W. Simmons, Mater. Sci. Eng. 207A (1996) 159
2. L.A. Norstrom, Met. Sci. 11 (1977) 208
3. F.B. Pickering, Proceedings of the International Conference on High Nitrogen Steels, HNS88, Lille, France, The Institute of metals, May 1988, p. 10
4. M. Grujicic, J.O. Nilsson, W.S. Owen, T. Thorvaldsson, Proceedings of the International Conference on High Nitrogen Steels, HNS 88, Lille, France, The Institute of Metals, May 1988, p. 151
5. J. Rawers, M. Grujicic, Mater. Perform. 4 (1995) 697