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<h2 id="see-also">See also</h2> <ul><li><a href="/facts/Sourcebook/kYhzfdKN">Sourcebook</a></li> <li><a href="/facts/Primary_source/t1l9U3Sm">Primary source</a></li> <li><a href="/facts/Secondary_source/gbRRKMwN">Secondary source</a></li></ul> <ul><li>Trine Fjordback Søndergaard, Jack Andersen and Birger Hjørland (2003): <a href="https://web.archive.org/web/20061207053624/http://www.db.dk/bh/UNISIST.pdf"><i>Documents and the communication of scientific and scholarly information. Revising and updating the UNISIST model</i></a>. "Journal of Documentation", 59 (3), pp. 278–320.</li></ul>