N. SAFRONOV, G. . The Formation of Spherical Graphite in Cast Irons with the Economy of Rare Earth Metals. Helix - The Scientific Explorer | Peer Reviewed Bimonthly International Journal, [S. l.], v. 9, n. 04, p. 5175-5177, 2019. Disponível em: https://helixscientific.pub/index.php/home/article/view/14. Acesso em: 29 mar. 2024.