1. H. Braunlich, Neugerbauer R., Closed loop control of deep drawing processes, SheMet 2001, Mechanical Engineering Department, Katholieke University Leuven, April 2001, pp. 529–538, ISBN: 90-73802-78-4.
2. B. Endelt, Least Square Optimization Techniques Applied on Sheet Metal Forming. PhD thesis, Department of Production, Aalborg University, Denmark, may 2003, ISBN: 87-91200-18-0.
3. Digital Control of Dynamic Systems;Franklin,1998
4. A Draw-In Sensor For Process Control and Optimization;Mahayotsanun,2005
5. K.B. Nielsen, Shimming—an experimental and numerical approach to include tool shimming, NumiSheet 2002, October 2002, pp. 267–272.