1. S.I. Oh, G.D. Lahoti, and T. Altan, ALPID—A General Purpose FEM Program for Metal Forming, Proceedings of NAMRC IX, May 1981, State College, Pennsylvania, p. 83.
2. B.L. Jenkins, S.I. Oh, and T. Altan, Investigation of Defect Formation in a 3-station Closed Die Forging Process, Report No. ERC/NSM-88–30, October 1988, ERC for Net Shape Manufacturing Ohio State University.
3. A. Badawy, T. Altan, G. Horvat, J.R. Douglas, D. Ostberg, and J. Chevalier, Computer Aided Design and Manufacturing (CAD/CAM) Techniques for Optimum Preform and Finish Forging of Spiral Bevel Gears, Phase II, DAAK 30-79-C-0071 US Army Tank-Automotive Command, Warren, Michigan, October 1982.
4. A. Turno, Closed Die Forging and Pressing of Components with Teeth (in German),Industrie-Anzeiger, 94 (83), Oct. 6, 1972, p. 1997.
5. R. Duggirala, and A. Badawy, Finite Element Method Approach to Forging Process Design,J. Materials Shaping Technology, Vol. 6, No. 2, 1988, pp. 81–89, 1988.