1. N. Akgerman, J. R. Becker, and T. Altan, “Preform Design in Closed-Die Forging,”Mettalurgia and Metal Forging, May 1973, pp. 135–138.
2. R. C. Jones,Drop Forging Die Design, The Association of Engineering and Shipbuilding Draftmen, Richmond, Survey (1965).
3. S. K. Biswas and W. A. Knight, “Towards an Integrated Design and Production System for Hot Forging Dies,”Int. J. Prod. Res., 1979, Vol. 14, No. 1, pp. 23–49.
4. A. N. Bruchanov and S. K. Rebelski, “Closed Die Forging and Warmpressing” VEB Verlag Technik, Berlin (1955).
5. K. Lange, “Closed Die Forging in Steel,” Springer Verlag, Berlin (1958).