C. Lynch, K. Ashley, V. Aleven, and N. Pinkwart. Proc. ITS 2006 Workshop on Intelligent Tutoring Systems for Ill-Defined
Domains, volume 4053 of LNCS, page 1--10. Jhongli, Taiwan, Springer, (2006)
V. Aleven, B. McLaren, J. Sewall, and K. Koedinger. ITS'06: Proc. 8th Int'l Conf. on Intelligent
Tutoring Systems, volume 4053 of LNCS, page 61--70. Jhongli, Taiwan, Springer, (2006)
R. Baker, A. Corbett, and V. Aleven. ITS'08: Proc. 9th Int'l Conf. on Intelligent
Tutoring Systems, volume 5091 of LNCS, page 406--415. Montreal, Canada, Springer, (2008)
N. Pinkwart, V. Aleven, K. Ashley, and C. Lynch. ITS'06: Proc. 8th Int'l Conf. on Intelligent
Tutoring Systems, volume 4053 of LNCS, page 227--236. Jhongli, Taiwan, Springer, (2006)