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Research partially supported by NSF GP 23825.
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Dharmadhikari, S.W., Jogdeo, K. On characterizations of unimodality of discrete distributions. Ann Inst Stat Math 28, 9–18 (1976). https://doi.org/10.1007/BF02504726
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DOI: https://doi.org/10.1007/BF02504726