Reduction of Wear by Boron Based Multilayer Coatings on Forging Dies, Proceedings Metal Forming 2010, 13th International Conference, 19.-22. September 2010, steel research international, vol. 81, no. 9, pp. 290-293, ISBN 978-3-514-00754-3, Verlag Stahleisen, Toyohashi (Japan), September 2010