Abdul Wasy and  Balakrishnan G. and  Yi Qi Wang and  Atta Ur Rehman and  Jung Il Song,  Vickers Indentation Simulation of Buffer Layer Thickness Effect for DLC Coated Materials.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 73(1). 14 - 19
    [viewed 09 December 2019]. Available from: https://publications.waset.org/pdf/1677.