REFERENCES
- P. HELLMAN, H. LARKER, J. B. PFEFFER, and I. STROEMBLAD: ‘Modern developments in powder metallurgy’, (ed. H. H. Hausner), Vol. 4, 573-582; 1970, New York, Plenum.
- P. HELLMAN and E. SIDDERSTROM : ‘Gases in metals’, 161-173; 1975, Stockholm, Research Institute of Swedish National Defense.
- P. HELLMAN and H. WISELL : Fourth Conf. on ‘Powder metallurgy’; October 1975, Zakopane, Poland.
- P. HELLMANN: Met. Powder Rep., 1977, 32, 79–83.
- B. ALVELID and H. w1SELL: Scand. J. Metall., 1980, 9, 59–67.