Amado, J. M.; Álvarez, C.; Nicolás, G.; López, A. J.; Pérez, J. A.; Ramil, A.; Saavedra, E.; Sanesteban, J.; Tobar, M. J.; Yáñez, A. Optimization of the Laser Path and Power in the Surface Heat Treatment of Diesel Engine Exhaust Values. Rev. metal. 2005, 41, 89-94.