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Journal Article The non-central chi-squared and beta distributions Get access G. A. F. SEBER G. A. F. SEBER Statistical Laboratory, University of Manchester Search for other works by this author on: Oxford Academic Google Scholar Biometrika, Volume 50, Issue 3-4, December 1963, Pages 542–544, https://doi.org/10.1093/biomet/50.3-4.542 Published: 01 December 1963
George A. F. Seber (Tue,) studied this question.