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http://www.autosteel.org/AM/Template.cfm?Template=/Search/SearchDisplay.cfm
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2. M.S. Rashid, C. Kim, E.F. Ryntz, F. Edward, F.I. Saunders, R. Verma, and S. Kim, “Quick Plastic Forming of Aluminum Alloy Sheet Metal,” US Patent No. 6,253,588 , July 3, 2001
3. W. Dykstra, G. Phaffmann, and X. Wu, “Method of Forming a Tubular Blank Into a Structural Component and Die Therefore,” US Patent No. 6,322,645 B1, Nov. 27, 2001
4. T. Altan “Hot-Stamping Boron-Alloyed Steels for Automotive Parts, Part I and Part II,” STAMPING JOURNAL®,
http://www.thefabricator.com/PressTechnology/PressTechnology_Article.cfm?ID=1542
5. Phaffmann G., Wu X., Dykstra W. (2000) Hot Metal Gas Forming of Auto Parts. Adv. Mater. Process. 2:H35–37