Correlation and regression
Armitage P (1980) Statistical Methods in Medical Research. Blackwell Scientific
Publications, Oxford UK. ISBN 0-632-05430-1 p. 147-166.
Significance and 95% confidence interval of correlation coefficient
t test : Armitage P. Statistical Methods in Medical Research (1971).
Blackwell Scientific Publications. Oxford. P.156-163.
Confidence Interval : Altman DG, Machin D, Bryant TN and Gardner MJ. (2000)
Statistics with Confidence Second Edition. BMJ Books ISBN 0 7279 1375 1. p. 89-92
http://www2.sas.com/proceedings/sugi31/170-31.pdfSAS paper discussing
the need for Fisher's Transformation