B. Yazhini, J. Sunil, S. Ramabalan. “Experimental Investigation on the Nanomechanical Properties of Lubricated and Non-Lubricated AISI 1018 Mild Steel Using Nanoindentation Technique”. Design Engineering, Oct. 2021, pp. 3646-59, http://thedesignengineering.com/index.php/DE/article/view/5311.