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...
J. Yang, и J. Leskovec. Proceedings of the Sixth ACM International Conference on Web Search and Data Mining, стр. 587--596. New York, NY, USA, ACM, (2013)