1. A. Schadschneider, W. Klingsch, H. Klüpfel, T. Kretz, C. Rogsch, and A. Seyfried. Evacuation dynamics: Empirical results, modeling and applications. In Encyclopedia of Complexity and System Science. Springer, Berlin, 2009.
2. A. Seyfried, M. Boltes, J. Kähler, W. Klingsch, A. Portz, T. Rupprecht, A. Schadschneider, B. Steffen, and A. Winkens. Enhanced empirical data for the fundamental diagram and the flow through bottlenecks. In Pedestrian and Evacuation Dynamics 2008. Springer, Berlin, 2010.
3. M. Boltes. Software PeTrack. Research Centre Jülich,
http://www.fz-juelich.de/jsc/petrack/
.
4. D.C. Brown. Close-range camera calibration. Photogrammetric Engineering, 37:855–866, 1971.
5. Z. Zhang. A flexible new technique for camera calibration. IEEE Transactions on Pattern Analysis and Machine Intelligence, 22(11):1330–1334, 2000.