by Jeffrey M Perkel
TRIBUTE	The Future of Citation Analysis The challenge is to track a work's impact when published in nontraditional forms Email: Jeffrey M Perkel - jperkel@the-scientist.com The Scientist 2005, 19(20):24 Published   24 October 2005

In the 50 years since Eugene Garfield first proposed it,[1] the Science Citation Index has grown dramatically in size and influence. The database has expanded from 1.4 million citations in 1964 to 550 million today. Its list of source journals has grown from 613 to 15,721. And it has become a key tool for tenure, funding, and award committees.

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