@article{SBTK09a,
 author = {Schreck, Tobias and Bernard, Jürgen and Tekušová, Tatiana and Kohlhammer, Jörn},
 journal = {Palgrave Macmillan Information Visualization},
 pages = {14--29},
 title = {Visual cluster analysis of trajectory data with interactive Kohonen maps},
 volume = {8},
 year = {2009}
}