1. The Correlation Coefficient: An Overview
2. Assessment, Measurement and Prediction for Personnel Decisions;Guion,1998
3. Pade Approximants (Encyclopedia of Mathematics and Its Implications);Baker,1996
4. E.B. Saff, Introduction to Padé approximants, Vanderbilt University, 〈http://www-sop.inria.fr/miaou/anap03/PadeTalk.pdf〉.
5. Numerical Recipes in C. The Art of Scientific Computing;Press,1999