| Internal
Resources |
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| • | Past
work (Lee et al. 05, Han et al. 05) used internal |
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| resources: |
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| – | Knowledge
encoded in the records themselves |
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| – | Used
field similarity, common co-author strings for |
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| clustering |
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| • | Problems
with using only internal resources |
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| – | May
provide insufficient information or difficult to extract |
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| – | e.g.,
two papers on the same topic using disjoint |
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| keywords
in their titles |
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| • | Therefore,
we use resources external to the citation |
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| data |
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