T. Athanasiadis, P. Mylonas, and Y. Avrithis. Proceedings of SAMT 2006, volume 4306 of Lecture Notes in Computer Science, page 212-225. Springer, (2006)
A. Quattoni, M. Collins, and T. Darrell. ICCVW '05: Proceedings of the Tenth IEEE International Conference on Computer Vision Workshops, page 1877. Washington, DC, USA, IEEE Computer Society, (2005)
C. Saathoff, and S. Staab. 9th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2008), page 16-19. Los Alamitos, CA, USA, IEEE Computer Society, (2008)