Skoric, B. , Miletic, A. , Terek, P. , Kovacevic, L. , Kukuruzovic, M.. "Nano Effects of Nitrogen Ion Implantation on TiN Hard Coatings Deposited by PVD and IBAD". World Academy of Science, Engineering and Technology, Open Science Index 111, International Journal of Materials and Metallurgical Engineering (2016), 10(3), 335 - 340.