M. Rithinyo, K. Taysongnoen, A. MayaI, A. Khongrit, P. Runkratok, and J. Nithikarnjanatharn, “Effect of Sub-zero Treatments and Heat Treatment under Pressure of Quenching Media on Wear of Blanking Die”, IENJ, vol. 3, no. 2, pp. 7–14, Jul. 2017.