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- [4] The mathematical representation of frequency distributions QUARTERLY PUBLICATIONS OF THE AMERICAN STATISTICAL ASSOCIATION, 1921, 17 : 885 - 892
- [5] The mathematical representation of frequency distributions QUARTERLY PUBLICATIONS OF THE AMERICAN STATISTICAL ASSOCIATION, 1921, 17 : 720 - 731
- [8] Mathematical expectation of product moments of samples drawn from a set of infinite populations ANNALS OF MATHEMATICAL STATISTICS, 1935, 6 : 30 - 52
- [10] On the Use of the Factorial Moments in the Study of discontinuous Frequency Distributions SKANDINAVISK AKTUARIETIDSKRIFT, 1939, 22 : 22 - 31