1. Lee, R., Shiina, H., Takakura, H., Kwon, Y.J., Kambayashi, Y.: Map-based Range Query Processing for Geographic Web Search Systems. In: Digital Cities 3 Workshop: local information and communication infrastructures experiences and challenges, Amsterdam, The Netherlands, September 18-19, pp. 1–10 (2003)
2. Lee, R., Shiina, H., Takakura, H., Kwon, Y.J., Kambayashi, Y.: Optimization of Geographic Area to a Web Page for Two-Dimensional Range Query Processing. In: Proceedings of Fourth International Conference on Web Information Systems Engineering Workshops, December 13, pp. 1–9 (2003)
3. Ishikawa, Y., Tsukamoto, Y., Kitagawa, H.: Implementation and evaluation of an adaptive neighborhood information retrieval system for mobile users. In: Proceedings of Fourth International Conference on Web Information Systems Engineering Workshops, December 13, pp. 25–33 (2003)
4. Jang, J.-H., Kim, D.-H., Lee, R., Kambayashi, Y., Kwon, Y.-J.: An Optimizing Method for Generating Index Association by Using Property of Sparse Matrix. In: Proc. of International Conference on Internet Information Retrieval 2003, Koyang City, Korea, October 30, pp. 229–232 (2003)
5. Jang, J.-H., Lee, R., Kambayashi, Y., Kwon, Y.-J.: Implementation of “Kyonggi21Search” combining GIS with The Web: Optimization of Index Association. In: Proc. of the 30th KISS Fall Conference, Seoul, Korea, October 24-25, vol. 30(2), pp. 79–81 (2003)