Barrena, M. I., and A. Castro. “Behaviour of AISI-SAE 8615 Steel in Ferritic Nitrocarburizing Using Urea-Metanol”. Revista de Metalurgia 34, no. 3 (June 30, 1998): 261–267. Accessed May 21, 2024. https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/792.