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On the Normalization and Visualization of Author Co-citation Data: Salton's
cosine versus the Jaccard Index <>
, Journal of the American Society for Information Science and Technology

<pdf-version at http://www/>  

Loet Leydesdorff 
Amsterdam School of Communications Research (ASCoR),
Kloveniersburgwal 48, 1012 CX Amsterdam,
Tel.: +31-20- 525 6598; fax: +31-20- 525 3681 
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