@conference{WWS12,
 author = {Wanner, Franz and Weiler, Andreas and Schreck, Tobias},
 booktitle = {Published at the 2nd IEEE Workshop on Interactive Visual Text Analytics "Task-Driven Analysis of Social Media" as part of the IEEE VisWeek 2012, October 15th, 2012, Seattle, Washington, USA},
 title = {Topic Tracker: Shape-based Visualization for Trend and Sentiment Tracking in Twitter},
 year = {2012}
}