S. Auer, и K. Fähnrich. Proceedings of the 17th International Conference on Production and Research 2003, August 3-7, Blacksburg, Virginia USA Virginia Tech Blacksburg, (августа 2003)
S. Auer, и K. Fähnrich. HCI International (International Conference on Human-Computer Interaction) October 2003, Proceedings of the 10th International Conference on Human-Computer Interaction, том 3 из Cognitive, Social and Ergonomic Aspects Mahwah/NJ, стр. 956-960. Erlbaum, (октября 2003)