Arenas, M. A., R. Rodríguez, and J. J. de Damborenea. “Effect of Cerium and Lanthanum Ion Implantation on Corrosion Behaviour of Hot Dip Galvanised Steel”. Revista De Metalurgia, vol. 37, no. 5, Oct. 2001, pp. 591-6, doi:10.3989/revmetalm.2001.v37.i5.525.