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姬永刚, 李树有, 赵世舜, 史海芳
Maximum Likelihood Estimation of Ratios of Means and Standard Deviations from Normal Populations under Treeorder Restriction
JI Yonggang, LI Shuyou, ZHAO Shishun, SHI Haifang
吉林大学学报(理学版) . 2008, (05): 829 -835 .