Multi-objective optimization in Turning of EN31 steel using Taguchi based grey relational analysis. International Journal of Current Engineering and Technology, [S. l.], v. 6, n. 4, p. 1317–1322, 2016. DOI: 10.14741/. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/3033. Acesso em: 2 may. 2026.