1. V. Aleven, K. Ashley, C. Lynch, N. Pinkwart, in: Proceedings of the Intelligent Tutoring Systems for Ill-Defined Domains Workshop, ITS’2006, 2006.
2. V. Aleven, B.M. McLaren, J. Sewall, K. Koedinger, The Cognitive Tutor Authoring Tools (CTAT): preliminary evaluation of efficiency gains, in: Proceedings of the Eightieth International Conference on Intelligent Tutoring Systems, 2006, pp. 61–70.
3. A. Mitrovic, C. Heiner, R. Baker, K. Yacef, Authoring constraint-based tutors in ASPIRE, in: Proceedings of the Eightieth International Conference on Intelligent Tutoring Systems, 2006, pp. 41–50.
4. F. Kabanza, R. Nkambou, K. Belghith, Path-planning for autonomous training on robot manipulators in space, in: Proceedings of the Ninetieth International Joint Conference on Artificial Intelligence, 2005, pp. 1729–1731.
5. Building Intelligent Interactive Tutors. Student Centered Strategies for Revolutionizing e-Learning;Woolf,2009