LEINONEN, J. I. Superior Properties of Ultra-fine-grained Steels. Acta Polytechnica, Prague, Czech Republic, v. 44, n. 3, 2004. DOI: 10.14311/572. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/572. Acesso em: 3 apr. 2025.