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Svenonius, E.: Unanswered questions in the design of controlled vocabularies (1986)
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White, H.: Examining scientific vocabulary : mapping controlled vocabularies with free text keywords (2013)
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Mai, J.-E.: Actors, domains, and constraints in the design and construction of controlled vocabularies (2008)
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Doerr, M.: Semantic problems of thesaurus mapping (2001)
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Research questions for the twenty-first century (2003)
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