1. 1) V. A. Tracey: Int. J. Powder Metall. Powder Tech. 12 (1976) 25.
2. 2) L. Albano-Muller: Powder Metall. Int. 14 (1982) 73.
3. 3) Handbook of Cellular Metals, ed. H. P. Degischer and B. Kriszt (Wiley-VCH Verlag GmbH, Weinheim, 2002).
4. 4) M. Imabayashi, M. Ichimura and Y. Kanno: Trans., JIM 24 (1983) 93–100.
5. 5) I. Svensson and H. S. Fredriksson: Proc. Int. Conf. organized by the Applied Metallurgy and Metals Tech. Group of TMS, U. of Warwick, (1980) p. 376–380.