Visualization of graph data is incredibly challenging, particularly when it comes to extremely large, scale-free graphs and social networks. A few simple searches on the Web and you will find some mesmerizing and very cool images. Perhaps the most cited...
S. Papadopoulos, Y. Kompatsiaris, и A. Vakali. Proceedings of the 12th international conference on Data warehousing and knowledge discovery, стр. 65--76. Berlin, Heidelberg, Springer-Verlag, (2010)
D. Liu, X. Hua, L. Yang, M. Wang, и H. Zhang. Proceedings of the 18th international conference on World wide web, стр. 351--360. New York, NY, USA, ACM, (2009)