1. E.L. Eisenstein: The Printing Press as Agent of Change (Cambridge Univ. Press, Cambridge 2013),
https://www-cambridge-org.ep.fjernadgang.kb.dk/core/books/the-printing-press-as-an-agent-of-change/7DC19878AB937940DE13075FE839BDBA
2. J.B. Thomson: Books in the Digital Age: The Transformation of Academic and Higher Education Publishing in Britain and the United States (Polity, Cambridge 2005)
3. M. Mann: Introduction to Cataloging and the Classification of Books, 2nd edn. (American Library Association, Chicago 1930)
4. A. Van der Weel: Changing our Textual Minds, Towards a Digital Order of Knowledge (Manchester Univ. Press, Manchester 2011)
5. E. Garfield: Is information retrieval in the arts and humanities inherently different from that in science? The effect that ISI®'s Citation Index for the arts and humanities is expected to have on future scholarship, Libr. Q. 50(1), 40–57 (1979)