参考文献：
Graybill, Franklin. 1961. An Introduction to Linear Statistical Models. McGraw-Hill. New York, New York.
Guenther, William C. 1977. 'Desk Calculation of Probabilities for the Distribution of the Sample Correlation Coefficient', The American Statistician, Volume 31, Number 1, pages 45-48.
Zar, Jerrold H. 1984. Biostatistical Analysis. Second Edition. Prentice-Hall. Englewood Cliffs, New Jersey.