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Bookstein, A.; Swanson, D.R.: Probabilistic models for automatic indexing (1974)
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Bookstein, A.; Swanson, D.R.: ¬A decision theoretic foundation for indexing (1975)
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Swanson, D.R.; Smalheiser, N.R.; Torvik, V.I.: Ranking indirect connections in literature-based discovery : the role of Medical Subject Headings (2006)
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