1. , , , & (1995). Combining agents and visualisation for large information spaces. Proceedings of CKBS-SIG Workshop on Intelligent Agents and the Next Information Revolution, Manchester, UK.
2. , , & (1995). HyperSpace: Web browsing with visualisation. Third International World-Wide Web Conference Poster Proceedings (pp. 21–25).
3. , , & (1997). Human–computer interaction (2nd ed.). Englewood Cliffs, NJ: Prentice-Hall.