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Providing ranked cooperative query answers using the metricized knowledge abstraction hierarchy Shin, MK; Huh, Soon-Young; Lee, W, EXPERT SYSTEMS WITH APPLICATIONS, v.32, no.2, pp.469 - 484, 2007-02 |
Relaxing queries with hierarchical quantified data abstraction Shin, MK; Huh, Soon-Young; Park, D; Lee, W, JOURNAL OF DATABASE MANAGEMENT, v.19, no.4, pp.47 - 61, 2008-10 |
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