1. Principles and methods of sheet metal fabricating;Sachs,1951
2. Schroeder W. Mechanics of sheet metal bending.Transactions of the ASME 1943;36:138–45.
3. Gardiner FJ. The springback of metals.Transactions of the ASEME 1958;49:1–9.
4. Singh AN, Johnson W. Springback after cylindrically bending metal strips. Dr Karunesh Memorial International Conference, New Delhi, December 1979.
5. A note on plastic torsion;Huth;J. Appl. Mech,1955