1. Zuidema, B.; Denner, S.; Engl B.; Sperle J.: New high strength steels applied to the body structure of ULSAB-AVC SAE Transactions, Journal of Materials and Manufacturing, Section 5 Vol. 110 (2001), pp. 984–992.
2. Sperle J.; Olsson K.: High strength and ultra-high strength steels for weight reduction in structural and safety related applications 29th Int. Symposium on Automotive Technology & Automation (ISATA) Florence, June 1996.