1. M. O. Speidel, in Proceedings of the 1st International Conference on High Nitrogen Steels ?HNS 88?, Lille, May 1988, edited by J. Foct and A. Hendry (The Institute of Metals, London, 1989) p. 92.
2. J. Menzel, G. Stein andP. Dahlmann, in Proceedings of the 1st International Conference on High Nitrogen Steels ?HNS 88?, Lille, May 1988, edited by J. Foct and A. Hendry (The Institute of Metals, London, 1989) p. 147.
3. P. J. Uggowitzer andM. Harzenmoser, in Proceedings of the 1st International Conference on High Nitrogen Steels ?HNS 88?, Lille, May 1988, edited by J. Foct and A. Hendry (The Institute of Metals, London, 1989) p. 174.
4. M. O. Speidel, in Proceedings of the 2nd International Conference on High Nitrogen Steels ?HNS 90?, Aachen, October 1990, edited by G. Stein and H. Witulski (Stahl Eisen, Düsseldorf, 1990) p. 128.
5. P. J. Uggowitzer andM. O. Speidel, in Proceedings of the 2nd International Conference on High Nitrogen Steels ?HNS 90?, edited by G. Stein and H. Witulski (Stahl Eisen, Düsseldorf, 1990) p. 156.