Homjabok, W., K. Nuilek, N. Posungnoen, and H. Humthaisong. “Academic article: Spheroidizing Process and Applying to Pack Carburizing Process”. RMUTP Research Journal Sciences and Technology, vol. 18, no. 1, June 2024, pp. 186-97, doi:10.14456/jrmutp.2024.16.