**2.1 Link analysis**

Link analysis is a quantitative study of hyperlinks among websites [15]. Similar to a mechanism of counting of quoted works in journals and articles, the importance of websites can be evaluated with links and their analysis. As previously mentioned, the importance or influence of a website on the Internet is defined as Web Impact Factor [5], which, obviously, is similar to the concept of an impact factor of a journal (*Journal Impact Factor, JIF*).

The idea behind the link analysis is that one can practically assume that a number of links pointing to (guiding toward another location) the academic space of a web content can be proportional to productivity of a research of an organization at the level of a university [9], departments [16], research groups [17], or individual researches [18].

Calculation of WIF [19] can be obtained as a logic amount of a number of links, i.e., external or incoming links (*inlinks*) toward a website divided by a number of sites of a certain web host in a certain moment of time. Further information regarding the calculation of WIF is to be looked for in the work [6, 19].
