Stigler, Stephen M. The History of Statistics: The Measurement of Uncertainty Before 1900. Harvard University Press. 1986: 225–226. ISBN 978-0-67440341-3.
Hubbard, Raymond; Lindsay, R. Murray. Why P Values Are Not a Useful Measure of Evidence in Statistical Significance Testing. Theory & Psychology. 2008, 18 (1): 69–88. doi:10.1177/0959354307086923.