S. I. IBRAHIM, D. Ultrasonic Defect Sizing in Grey Cast Iron Compared with Steel, Using the Maximum Echo Amplitude Technique. Al-Rafidain Engineering Journal (AREJ), [S. l.], v. 13, n. 2, p. 56–71, 2005. DOI: 10.33899/rengj.2005.45634. Disponível em: https://ojs.uomosul.edu.iq/index.php/arej/article/view/27001. Acesso em: 7 aug. 2025.