This ranking scheme appears to rely on citations to a given article in other articles, which works all right within one field but isn't very effective when multiple fields are compared. For example, a sociology article with ten citations isn't remotely comparable to a math or physics article with ten citations.<p>Further, the questionable nature of the rankings is apparent from the default list, in which journals of obvious merit are way down the rankings, below journals of much less self-evident standing. The journal Cell ranks 7th, and Nature ranks 14th -- something is clearly wrong.