Ma, G. , Lin, G. , Gong, S. , Sun, G. , Wang, D. (2012). 'The Influence of Substrate Bias on the Mechanical Properties of a W- and S-containing DLC-based Solid-lubricant Film'. World Academy of Science, Engineering and Technology, Open Science Index 68, International Journal of Materials and Metallurgical Engineering, 6(8), 712 - 715.