Multi-objective Optimization of Wire Electric Discharge Machining of EN31 Tool Steel using Orthogonal array with Principal Component Analysis. International Journal of Current Engineering and Technology, [S. l.], v. 4, n. 2, p. 1027–1033, 2014. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/660. Acesso em: 11 apr. 2026.