1. Benzinger: Flexible automated manufacturing of flat sheet metal components in low quantities. In Proceedings of the 3rd International Conference on Flexible Manufacturing System and 17th Annual 1PA Conference, 11./13. Sept. 1984, Boeblingen, W. Germany.
2. Hatvany: World Survey of CAM. Butterworths 1983.
3. Handbook of Metal Forming;Lange,1985
4. DIN 8582: “Fertigungsverfahren Umformen (Production Processes Metal Forming)”, (published by Deutscher Normenausschuß, in German). Beuth Verlag, Berlin, 1971.
5. Lange, K.: Flexible Manufacturing Systems for Metal Working. Proc. of 1st Int. Conf. on Techn. of Plasticity Tokyo 1984, Tokyo 1984, Vol 1, PP 434–445.