1. Ibrahim, A., Katz, B., Lin, J.: Extracting structural paraphrases from aligned monolingual corpora. In: Proceedings of the Second International Workshop on Paraphrasing (ACL 2003)
2. Iordanskaja, L., Kittredge, R., Polgere, A.: Lexical selection and paraphrase in a meaning-text generation model. In: Natural Language Generation in Artificial Intelligence and Computational Linguistics. Kluwer Academic (1991)
3. Graesser, A.C., Olney, A., Haynes, B.C., Chipman, P.: Autotutor: A cognitive system that simulates a tutor that facilitates learning through mixed-initiative dialogue. In: Cognitive Systems: Human Cognitive Models in Systems Design. Erlbaum, Mahwah (2005)
4. Rus, V., Graesser, A.C.: Deeper natural language processing for evaluating student answers in intelligent tutoring systems. In: Paper Presented at the Annual Meeting of the American Association of Artificial Intelligence (AAAI 2006), Boston, MA, July 16-20 (2006)
5. Rus, V., Nan, X., Shiva, S., Chen, Y.: Clustering of Defect Reports Using Graph Partitioning Algorithms. In: Proceedings of the 20th International Conference on Software and Knowledge Engineering, Boston, MA, July 2-4 (2009)