1. Abowd, G.: Classroom2000: An Experiment with the Instrumentation of a Living Educational Environment. IBM System Journal, Special issue on Pervasive Computing. Vol. 38, Nr. 4, pp. 508–530, (1999).
2. Baloian, N., Hoppe, H.U., Kling, U.: Structural Authoring and Cooperative use of Instructional Multimedia Material for the Computer integrated Classroom. In: Proceedings of the ED-Media, Graz, Austria (1995). 81–86
3. Baloian, N., Hoppe, H.U., Pino, J.A.: A Teaching/Learning Approach to CSCL. In: IEEE Comp. Science press, Los Alamitos, CA (USA) 33rd Annual Hawaii International Conference on System Science. Maui, HI (USA). (2000)
4. Berge, Z. & Collins, M. (eds.): Computer-mediated Communication and the Online Classroom, Hampton Press, New Jersey, USA, (1995)
5. Colazzo, L. & Molinari, A.: To see or not to see: tools for teaching with hypertext slides. In: H. Maurer (Ed.): Proceedings of ED-Media 95 (World Conf. on Educational Multimedia and Hypermedia), Graz, Austria (1995) 17–21