@inproceedings{2002-lumberjack,
  title = {LumberJack: Intelligent Discovery and Analysis of  Web User Traffic Composition},
  author = {Ed H. Chi AND Adam Rosien AND Jeffrey Heer},
  booktitle = {WEBKDD},
  year = {2002},
  pages = {1--16},
  url = {http://vis.stanford.edu/papers/lumberjack}
}