1. The Scope and Limitations of Curve Fitting
2. J.C. Davis, Statistics and Data Analysis in Geology, Wiley, New York, 1973
3. A. Ralston, Introducción al análisis numérico, Limusa-Wiley, New York, 1970
4. R.E. Walpole, R.H. Myers, Probability and Statistics for Engineers and Scientists, 4th ed., MacMillan, New York, 1990
5. Partial least-squares regression: a tutorial