1. Punch–die clearances;Biegel;Tool Manuf. Eng.,1962
2. H.H. Hugo, Good stamping starts with the dies, Iron Age (1969) 72–74.
3. Higher speeds for punch processes;Cook;Tool Manuf. Eng.,1962
4. Blanking and piercing without any burr;Lange;Ann. CIRP,1978
5. Press and die alignment—key to stamping efficiency;Eary;Tool Manuf. Eng.,1962