1. Deburring and edgefinishing handbook;Gillespie,1999
2. Die design handbook;Smith,1990
3. Shibata K, Clearance setting method in punching shear work. Patent 61-46329, Japan, 1986.
4. Wanibuchi A. Work punching method. Patent 59-66934, Japan, 1984.
5. Behavior of materials of construction under pure shear;Izod;Proceedings Of The Institution Of Mechanical Engineers,1906