1. 1. C. Leyens, and M. Peters, “Titanium and Titanium Alloys Fundamentals and Applications”, 1st Edition, Germany: Wiley-VCH Verlag GmbH & Co, 2003.
   2. O. Yilmaz, N. Gindy, and J. Gao, “A repair and overhaul methodology for aeroengine components”, Robotics and Computer Integrated Manufacturing, 26, 190–201, 2010.
   3.  R. Ramesh, M. Duraiselvam, V. Petley, S. Verma, and R. Rajendran, :Microstructural and mechanical characterization of Ti6Al4V refurbished parts obtained by laser metal deposition”, Materials Science & Engineering A, 643, 64 – 71, 2015.
   4. Y. Zhang, H. Sahasrabudhe, and A. Bandyopadhyay, “Additive manufacturing of Ti-Si-N ceramic coatings on titanium”, Applied Surface Science, 346, 428–437, 2015.
   5. W. Pawlak, K. J. Kubiak, B. G. Wendler, and T. G. Mathia, “Wear resistant multilayer nanocomposite WC1- x/C coating on Ti–6Al–4V titanium alloy”, Tribology International, 82, 400–406, 2015
   6. Y. Wenhai, T. Jin, T. Wei, Z. Jun, L. Yongquan, and L. Yanzheng, “Study of yttrium and cerium on the oxidation resistance of silicide coatings prepared on Ti-6Al-4V alloy by pack-cementation process”, Journal of Rare Earths, 33, 221, 2015.
   7.  Z. Liu, Q. An, J. Xu, M. Chen, and S. Han, “Wear performance of (nc-AlTiN)/(a-Si3N4) coating and (ncAlCrN)/(a Si3N4) coating in high-speed machining of titanium alloys under dry and minimum quantity lubrication (MQL) conditions”, Wear, 305, 249–259, 2013.
   8.  J. Courant, J. Hantzpergue, and S. Benayoun, “Surface treatment of titanium by laser irradiation to improve resistance to dry-sliding friction”, Wear 236, 39–46, 1999