4868733 Document filing system with knowledge-base network of concept interconnected by generic, subsumption, and superclass relations: Hiromichi Fujisawa, Jun'ichi Higashino, Atushi Hatakeyama, Tokorozawa, Japan assigned to Hitachi Ltd
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论文评审过程：Available online 26 February 2003.
论文官网地址：https://doi.org/10.1016/0957-4174(90)90040-2
