Kittur A, Chi EH, Pendleton BA, Suh B, Mytkowicz T (2007) Power of the few vs. wisdom of the crowd, Wikipedia and the rise of the bourgeoisie25th Annual ACM Confernce on Human Factors in Computing Systems (CHI 2007). 28 April–3 May 2007; San Jose, California, United States.
Pan B, Hembrooke H, Joachims T, Lorigo L, Gay G (2007) In Google we trust: Users' decisions on rank, position, and relevance. J Comp-Mediated Comm 12article 3.
Barabasi A, Albert R, Jeong H (2000) Scale-free characteristics of random networks: the topology of the World-Wide Web. Phys A 281: 69-77.