W. Kienreich, M. Granitzer, V. Sabol, and W. Klieber. DEXA '06: Proceedings of the 17th International Conference on Database and Expert Systems Applications, page 181--188. Washington, DC, USA, IEEE Computer Society, (2006)
Y. Cao, M. Miller, S. Mori, R. Winslow, and L. Younes. CVPRW '06: Proceedings of the 2006 Conference on Computer Vision
and Pattern Recognition Workshop, page 67. Washington, DC, USA, IEEE Computer Society, (2006)