1. The neutral line and its application to bend allowances;Dickason;Sheet Met. Ind.,1952
2. The neutral line in sheet metal forming;Dickason;Sheet Met. Ind.,1964
3. Practical approach to the theory of neutral line;Park;Sheet Met. Ind.,1952
4. Mechanics of sheet metal bending;Schroeder;Trans. ASME,1943
5. Bending of an ideal plastic metal;Lubahn;Trans. ASME,1950