1. “Intelligent User Interfaces: An Introduction”, Morgan Kaufmann, RUIU, San Francisco, 1998, pp. 1-13
2. “Next Generation Intelligent Interfaces: Implicit Human-Computer Interaction”, Beat Signer, Vrije Universiteit Brussel
3. “Cross-Media Information Spaces and Architectures”, Beat Signer, Vrije Universiteit Brussel
4. “Intelligent User Interfaces”, Daniel Sonntag, German Research Centre for Artificial Intelligence (DFKI)
5. “Intelligent User Interfaces: Past, Present and Future”, V. López Jaquero, et.al., https://www.researchgate.net/publication/226527078