Trakunsaranakom, Chanyut. “Study on Surface Improvement of the Fixed Mold for Wear Resistance by Salt Bath Nitrocarburizing Hardening Process”. Princess of Naradhiwas University Journal 12, no. 2 (July 25, 2019): 207–222. Accessed May 2, 2024. https://li01.tci-thaijo.org/index.php/pnujr/article/view/197940.