C. Damme, M. Hepp, and K. Siorpaes. In Proceedings of the ESWC Workshop ``Bridging the Gap between Semantic
Web and Web 2.0'' (SemNet 2007), page 57--70. (2007)
D. Willems, and L. Vuurpijl. Proceedings of the Ninth international conference on document analysis and recognition, page 869-873. Curitiba, Brazil, (2007)