@inproceedings{KKS+09a,
 author = {Keim, Daniel A. and Kohlhammer, Joern and Santucci, Giuseppe and Mansmann, Florian and Wanner, Franz and Schaefer, Matthias},
 booktitle = {Proceedings of eChallenges 2009},
 title = {Visual Analytics Challenges},
 year = {2009}
}