References
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- Hogg , R. V. and Craig , A. T. 1965 . Introduction to Mathematical Statistics , New York : MacMillan .
- Kendall , M. G. and Stuart , A. 1973 . The Advanced Theory of Statistics , Vol. II , London : Griffin .
- Polya , G. “Remarks on characteristic functions,” . Proceedings of the First Berkeley Symposium on Mathematical Statistics and Probability . pp. 115 Berkeley , CA : University of California Press .