C. Brewster, F. Ciravegna, and Y. Wilks. NLDB '02: Proceedings of the 6th International Conference on Applications of Natural Language to Information Systems-Revised Papers, page 203--207. London, UK, Springer-Verlag, (2002)
S. Bateman, C. Brooks, and G. Mccalla. in Proc. Workshop on Applications of Semantic Web Technologies for e-Learning, at the 4th International Conference on Adaptive Hypermedia and Adaptive Web-based Systems, page 3--12. (2006)