@inproceedings{zhao2005,
  author = {Shengdong Zhao and Michael J. McGuffin and Mark H. Chignell},
  title = {Elastic Hierarchies: Combining Treemaps and Node-Link Diagrams},
  booktitle = {Proceedings of
     IEEE Symposium on Information Visualization (InfoVis) 2005},
  year = 2005,
  month = "October",
  pages = {57--64},
  location = "Minneapolis, Minnesota"
}