Lamerz, L.: E-Books in der Wissenschaft - Fluch oder Segen? : Eine Untersuchung der Nutzungsstatistiken der Universitäts- und Landesbibliothek Düsseldorf im Bereich E-Books (2012)
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- Vgl.: http://www.degruyter.com/view/j/iwp.2012.63.issue-4/iwp-2012-0049/iwp-2012-0049.xml?format=INT.