Sivarajan, S., R. Padmanabhan, and A. Kumar Sharma. “Improvement in the Tribological Properties of AISI D2 Die Steel by DLC and WC-C Coatings”. Journal of Surface Science and Technology, vol. 35, no. 1-2, June 2019, pp. 54-59, doi:10.18311/jsst/2019/20110.