1. Lynch, C.F., Ashley, K.D., Aleven, V., Pinkwart, N.: Defining ill-defined domains; a literature survey. In: Intelligent Tutoring Systems (ITS 2006): Workshop on Intelligent Tutoring Systems for Ill-Defined Domains (2006)
2. Joolingen, W.R., Zacharia, Z.C.: Developments in inquiry learning. In: Balacheff, N., Ludvigsen, S., de Jong, T., Lazonder, A., Barnes, S. (eds.) TEL, pp. 21–37 (2009)
3. Mayer, R.E.: Should there be a three-strikes rule against pure discovery learning? - the case for guided methods of instruction. American Psychologist, 14–19 (2004)
4. Murray, T.: Authoring intelligent tutoring systems: An analysis of the state of the art. International journal of artificial intelligence in education 10, 98–129 (1999)
5. Brooks, R.A.: Intelligence without representation. Artificial Intelligence 47, 139–159 (1991)