A. Schenker, H. Bunke, M. Last, and A. Kandel. Document Analysis Systems, volume 3163 of Lecture Notes in Computer Science, page 401-412. Springer, (2004)
H. Lieberman, and J. Espinosa. IUI '06: Proceedings of the 11th international conference on Intelligent user interfaces, page 226--233. New York, NY, USA, ACM, (2006)
C. Tantipathananandh, T. Berger-Wolf, and D. Kempe. KDD '07: Proceedings of the 13th ACM SIGKDD international conference on Knowledge discovery and data mining, page 717--726. New York, NY, USA, ACM, (2007)