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A study of missing Web-cites in scholarly articles: towards an evaluation framework

School of Information Systems, Victoria University, Melbourne, Australiacarmine.sellitto{at}vu.edu.au

This paper reports on a study that examined citation practice in a set of scholarly papers. After evaluating 2162 bibliographic references it was found that 48.1% (1041) of all citations used in the papers referred to a Web-located resource. A significant number of references to URLs were found to be missing (45.8%) and an evaluation of these Weblocated citations allowed the average half-life (4.8 years) for these missing resources to be determined. The study also examined the composition of the top-level domains associated with resource loss as well as the proportional use of Web-located resources in individual articles. The proportional use of Web-located resources in individual articles and their corresponding evaluation for disappearance has not been previously documented. The paper utilized the proportional Web-citation aspect of articles in proposing a Webresource contribution index and a Web-citation use-loss grid that may aid future authors, editors and, in particular, researchers in investigating this growing aspect of citation behaviour.

Key Words: citation • permanency • Web-located resource • URL • evaluation framework

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