1. Weidner T., Kolleck R., Rauer J., Kleiner M. Optimized workpiece properties in sheet metal forming processes by the use of high-strength steels. In Proceedings of International Conference on Sheet Metal (Eds Geiger M., Kals H. J. J., Shirvani B., Singh U.P.), 1999, pp. 295–302 (Meisenbach Verlag, Bamberg).
2. Kleiner M., Homberg W., Brosius A. Processes and control of sheet metal hydroforming. In Proceedings of 6th ICTP on Advanced Technology of Plasticity (Ed. Geiger M.), 1999, Vol. 2, pp. 1243–1252 (Springer-Verlag, Berlin).