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Claassen, W.; Cornelius, P.; Ehrmann, D.; Tanghe, P.: Fachwissen Online-Recherche : Suchstrategien in Online-Datenbanken (1988)
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Steinhaus, I.: Online recherchieren : Ökonomische Wege zu Informationen (1997)
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Carstens, C.: Ontology based query expansion : retrieval support for the domain of educational research (2012)
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