More articles, fewer citations

As more journal articles go online, only more recent articles tend to be cited, according to a linkurl:study published today;http://www.sciencemag.org/cgi/content/abstract/321/5887/395 in Science. In addition, only a small group of journals and articles are being cited, the study found. linkurl:James Evans,;http://sociology.uchicago.edu/people/faculty/evans.shtml a sociologist at the University of Chicago, surveyed a database of 34 million articles, their citations over the past 50 years, and t