1. Metal Stampings Chapters 3.2

5. Fascinating World of Sheet Metal

6. Manufacturing Engineering and Technology - Kalpakjian

10. http://aluminium.matter.org.uk/content/html/eng/ default.asp?CATID=84&PAGEID=-1941055071

11. Metal-Forming Process for Food and Beverage Containers FIGURE 7.76 The metal-forming process used to manufacture two-piece beverage cans.

12. Manufacturing Engineering and Technology - Kalpakjian

13. http://interbridgeinc.com/draw01.htm

15. CNC Punch Press www.alspi.com/ punchpress.htm

16. SME Handbook

18. Bralla

30. Pahl and Bietz