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Salton, G.; Yang, C.S.: On the specification of term values in automatic indexing (1973)
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Salton, G.; Waldstein, R.H.: Term relevance weights in on-line information retrieval (1978)
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Yu, C.T.; Salton, G.: Effective information retrieval using term accuracy (1971)
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Yu, C.T.; Salton, G.; Siu, M.K.: Effective automatic indexing using term addition and deletion (1978)
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