@InProceedings{Hertel:2009:SystemForVisualizingSpatioTemporalUrbanDatasets,
  author =       {Stefan Hertel and Matthias Wagner and R\"{u}diger Westermann},
  title =        {A System for Visualizing Spatiotemporal Urban Datasets},
  booktitle =    {Proceedings of Geoinformatics 2009 Area},
  year =         {2009},
}