Tibor Braun Ildikó Dióspatonyi Erika Zádor Sándor Zsindely Journal gatekeepers indicator-based top universities of the world, of Europe and of 29 countries - A pilot study. 155-178 2007 71 Scientometrics 2 http://dx.doi.org/10.1007/s11192-007-1843-4 db/journals/scientometrics/scientometrics71.html#BraunDZZ07