1. Aguilera, E. J. G., Bernsen, N. O., Bescós, S. R., Dybkjær, L., Fanard, F.-X., Hernandez, P. C., Macq, B., Martin, O., Nikolakis, G., de la Orden, P. L., Paternò, F., Santoro, C., Trevisan, D., Tzovaras, D., & Vanderdonckt, J. (2004). Usability evaluation issues in natural interactive and multimodal systems— State of the art and current practice (draft version). Technical report, NISLab, University of Southern Denmark. Project SIMILAR SIG7 on Usability and Evaluation, Deliverable D16.
2. Akyol, S., Libuda, L., & Kraiss, K.-F. (2001). Multimodale Benutzung adaptiver Kfz-Bordsysteme. In T. Jürgensohn & K.-P. Timpe (Eds.), Kraftfahrzeugführung (pp. 137–154). Berlin: Springer-Verlag.
3. Allen, J. F., & Core, M. G. (1997). Draft of DAMSL: Dialog Act Markup in Several Layers. http://www.cs.rochester.edu/research/cisd/resources/damsl .
4. Beringer, N., Kartal, U., Louka, K., Schiel, F., & Türk, U. (2002). PROMISE—A procedure for multimodal interactive system evaluation. Technical report, LMU München, Institut für Phonetik und sprachliche Kommunikation. Teilprojekt 1: Modalitätsspezifische Analysatoren, Report Nr. 23.
5. Bernsen, N. O., & Dybkjær, L. (2001). Exploring natural interaction in the car. In International workshop on information presentation and natural multimodal dialogue, Verona, Italy, pp. 75–79.