References
- Daniel , C. and Wood , F. S. 1980 . Fitting Equations to Data, , 2nd ed. , New York : John Wiley & Sons .
- Henze , Fritz H.-H. 1979 . “The Exact Noncentral Distribution of Spearman's r and Other Related Correlation Coefficients,” , 74 ( No. 366 ) June : 459 – 464 .