[ 1] WIDDER D V. An Inequality Related to One of Hilbert s Inequali ties[ J] . J. London Math. Soc. , 1924, ( 4) : 194- 198.[ 2] HARDY G H, LITTLEWOOD J E , POLYA G. Inequalities [M] . Cambridge Univ. Press. Cambridge, 1952.[ 3] HU Ke. On Hilber t s Inequality [ J] . Chin. Ann of Math. , 1992, 13( 1) : 35- 39.[ 4] GAO Ming - zhe, TAN Li, DDBNATH L. Some Improvements on Hilber t s Integral Inequality[ J] . J. Math. Anal. Appl. , 1999, 229( 2) : 682- 689.[ 5] 高明哲.关于 Hilbert 积分不等式[ J] . 应用数学, 1998, 11( 3) : 32- 35.