1. Fujiwara, H., Spectroscopic ellipsometry, Maruzen (2003), pp.5-6, 19, 39-44, 146-154 (in Japanese).
2. Holmberg, K., Andersson, P. and Erdemir, A., Global energy consumption due to friction in passenger cars, Tribology International, Vol. 47(2012), pp.221-234.
3. Ichimura, K., Umehara, N., Tokoroyama, T., Fuwa, Y. and Manabe, K., Discussion of super low friction mechanism of CNx coating against CNx under oil, Proceedings of Annual conference on the Japan Society of Mechanical Engineers (2014), Paper No. S1110603 (in Japanese).
4. Ikenaga, M. and Ikenaga, K., Properties and applications of DLC coatings, Journal of The Surface Finishing Society of Japan, Vol. 53, No. 11 (2011), pp.711-714 (in Japanese).
5. Kano, M., Martin, J. M., Yoshida, K. and Bouchet, M. I. D. B., Super-low friction of ta-C coating in presence of oleic acid, Vol. 2, No. 2 (2014), pp.156-163.