1. K. Lange, L. Cser, M. Geiger, J.A.G. Kals,: Tool life and tool quality in bulk metal forming, Keynote paper STC Forming 42nd General Assembly of CIRP, 1992
2. T. Altan: Design and manufacture of dies and molds, Annals of CIRP, 38 (1991) 2
3. Small quantity production in cold forging ICFG Document n° 7, 1988
4. P.F. Bariani, G. Berti, L. D’Angelo: Tool cost estimating at early stages of cold forging process design, Annals of CIRP, 42 (1993) 1, 279–282.
5. K. Lange, M. Knoerr, T. Altan: A fatigue analysis concept to avoid failure of forging tooling, Proc. of the 27th Plenary meeting of the ICFG, 1994, 1–10