1. Airy, G. B. (1879). On the Algebraic and Numerical Theory of Errors of Observations and the Combination of Observations. 3rd Ed. MacMillan, London.
2. Box, J. F. (1978). R. A. Fisher: The Life of a Scientist. Wiley, New York.
3. Box, J. F. (1981). Gosset, Fisher and the t-distribution. Amer. Statist. 35 61–66.
4. Eisenhart, C. (1979). On the transition from “Student’s” z to “Student’s” t. Amer. Statist. 33 6–10.
5. Fisher, R. A. (1915). Frequency distribution of the values of the correlation coefficient in samples from an indefinitely large population. Biometrika 10 507–521.