Fig. 1.
Normalized histogram of the number of articles P(c,c0) published in 1999 and having received c citations. We plot P(c,c0) for several scientific disciplines with different average number c0 of citations per article.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.