1. Aly, W., Uchida, S., Fujiyoshi, A., Suzuki, M.: Statistical classification of spatial relationships among mathematical symbols. In: Proceedings of ICDAR 2009, pages 1350–1354. IEEE Society Press, 2009.
2. Baker, J., Sexton, A., Sorge, V.: A linear grammar approach to mathematical formula recognition from PDF. In: Proceedings of Intelligent Computer Mathematics, LNAI. Springer Verlag, Germany, 2009.
3. Baker, J., Sexton, A., Sorge, V.: Faithful mathematical formula recognition from PDF documents. In: Proceedings of DAS 2010, 2010. Forthcoming.
4. Buswell, S., Caprotti, O., Carlisle, D. P., Dewar, M. C., Gaëtano, M., Kohlhase, M.: The OpenMath Standard. The OpenMath Society, June 2004.
5. Suzuki, M., Tamari, F., Fukuda, R., Uchida, S., Kanahori, T.: Infty—an integrated OCR system for mathematical documents. In: Proceedings of ACM Symposium on Document Engineering, pages 95–104. ACM Press, 2003.
6. Suzuki, M., Uchida, S., Nomura, A.: A ground-truthed mathematical character and symbol image database. In: Proceedings of ICDAR 2005, pages 675–679. IEEE Society Press, 2005.
8. Beusekom, J. van, Shafait, F., Breuel, T. M.: Automated OCR ground truth generation. In: Proceedings of DAS 2008, Sep 2008.