Oñate, J. I., M. Brizuela, A. García-Luis, I. Braceras, S. Pacheco, and J. L. Viviente. “Tribology of New Solid Lubricating Films Produced by PVD”. Revista De Metalurgia, vol. 41, no. Extra, Dec. 2005, pp. 148-53, doi:10.3989/revmetalm.2005.v41.iExtra.1015.