Evans J A. Electronic Publication and the Narrowing of Science and Scholarship. Science 2008;321(5887):395 - 399
Using a database of 34 million articles, their citations (1945 to 2005), and online availability (1998 to 2005), the author shows that as more journal issues came online, the articles referenced tended to be more recent, fewer journals and articles were cited, and more of those citations were to fewer journals and articles. The results of this study are that searching online is more efficient and following hyperlinks quickly puts researchers in touch with prevailing opinion, but this may accelerate consensus and narrow the range of findings and ideas built upon.