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Warner, A.J.: ¬The role of linguistic analysis in full-text retrieval (1994)
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Godby, J.: Two techniques for the identification of phrases in full text (1995)
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Graham, T.: ¬The free language approach to online catalogues : the user (1985)
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Allen, E.E.: Searching, naturally (1998)
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Wenzel, F.: Semantische Eingrenzung im Freitext-Retrieval auf der Basis morphologischer Segmentierungen (1980)
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Pritchard-Schoch, T.: Comparing natural language retrieval : Win & Freestyle (1995)
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Magennis, M.: Expert rule-based query expansion (1995)
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Wacholder, N.; Byrd, R.J.: Retrieving information from full text using linguistic knowledge (1994)
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