Barrera, G., M. A. Fabián, and C. A. Ugalde. “Detection, Identification and Classification of Defects Using ANN and a Robotic Manipulator of 2 G.L (Kohonen and MLP Algorithms)”. Revista De Metalurgia, vol. 38, no. 3, June 2002, pp. 163-72, doi:10.3989/revmetalm.2002.v38.i3.398.