1. L. Larason, M. Stromgren, and K. Svartstrom: “Effects of Porosity and Matrix on the Hardness of Powder Forged Steel,” Proceedings of PM 84, p. 1.
2. F. Hanejko: “P/M Hot Forming, Fundamentals and Properties,”Progress in P/M, vol. 33, 1977, pp. 16–17.
3. R. Husseby and M. Scheil: “Forging from P/M Preforms,”New Perspective in Powder Metallurgy: 6, Forging of Powder Metallurgy Preforms. M.P.I.F. 1973, pp. 83–101.
4. G. Bockstiegel and M. Stromgren: “Hoeganaes Automatic P.M. Forging Systems, Concept and Application,” S.A.E. Technical Paper, February 1979, p. 9.
5. G. Bockstiegel and M. Stromgren: “Hoeganaes Automatic P.M. Forging Systems, Concept and Application,” S.A.E. Technical Paper, February 1979, p. 6.