Laser treatment of surfaces of tool and PM steels and steels with coatingsSurženkov, Andrei; Allikas, Georg; Zimakov, Sergei; Kulu, Priit; Müller, H.Proceedings of the 6th International Conference of DAAAM Baltic "Industrial Engineering" : 24-26th April 2008, Tallinn, Estonia. [2]2008 / p. 555-560 : ill http://innomet.ttu.ee/daaam08/online/Materials%20Engineering/Surzhenkov.pdf

Surface fatigue and wear resistance of thin and thick hard coatingsKulu, Priit; Saarna, Mart; Sergejev, Fjodor; Gregor, Andre; Sivitski, Alina; Müller, H.IFHTSE International Federation for Heat Treatment and Surface Engineering 18th Congress : July 26-30, 2010, Rio de Janeiro, Brazil : [CD-ROM]2010 https://www.researchgate.net/publication/289598093_Surface_fatigue_and_wear_resistance_of_thin_and_thick_hard_coatings