1. The Advanced Theory of Statistics;M. Kendall,1979
2. The History of Statistics: The Measurement of Uncertainty before 1900;S. M. Stigler,1986
3. Mathematical contributions to the theory of evolution, III: regression, heredity and panmixia;K. Pearson,1896
4. Frequency-distribution of the vlaues of the correlation coefficient in samples from an indefinitely large population;R. A. Fisher,1915
5. On the probable error of a correlation coefficient,1908