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Göbel, S.; Sperber, W.: Bibliographische Klassifikationen in der Mathematik : Werkzeuge der inhaltlichen Erschließung und für das Retrieval (2010)
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Sperber, W.; Wegner, B.: Content Analysis in der Mathematik : Erschließung und Retrieval mathematischer Publikationen (2010)
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Greuel, G.-M.; Sperber, W.: swMATH - ein neuer Service für die Suche nach mathematischer Software (2013)
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