1. Duplex stainless steels: brief history and some recent alloys;Iris;Recent Patents Mech Eng,2008
2. J. Charles The Duplex Stainless Steels: Materials to Meet your Needs, Duplex Stainless Steels 91 J. Charles S. Bernhardsson Beune, France Les édition de physique 3 48
3. J. Charles Duplex families and applications: a review part 1: from duplex pioneers up to 1991 2015 1 5
4. Sandvik duplex stainless steel http://smt.sandvik.com/globalassets/global/downloads/products_downloads/tubular-products/s-120-eng_10.pdf 2017