2[1]Hundy B B. Elimination of 'Stretcher Strains' in Mild-steel Pressings. Journal of the Iron and Steel Institute, 1954,178(2):127~138.
3[2]Polakowski N H. Effect of Residual Stresses on Yielding and Strain-ageing of Carbon Steel. Journal of the Iron and Steel Institute, 1952,172(4):369~376.