B. PADMA; B. SATISH KUMAR; N. GOPIKRISHNA. OPTIMIZATION OF TURNING PROCESS PARAMETERS, ON EN 9 CARBON STEEL USING GREY RELATIONAL ANALYSIS. International Journal of Innovations in Engineering Research and Technology, Maharashatra, India, v. 4, n. 1, p. 1–5, 2021. Disponível em: https://repo.ijiert.org/index.php/ijiert/article/view/1295. Acesso em: 22 oct. 2025.