Bellas, L., Castro, G., Mera, L., Mier, J. L., García, A. and Varela, A. (2019) “Comparative study of AISI 4340 and AISI 347 nitrocarburizing by Tenifer-QPQ® process”, Revista de Metalurgia, 55(1), p. e136. doi: 10.3989/revmetalm.136.