1. D. Angluin. Queries and concept learning. Machine Learning, 2(4):319–342, 1988.
2. M. E. Cali. and R. J. Mooney. Relational learning of pattern-match rules for information extraction. In Proceedings of the Sixteenth National Conference on Artificial Intelligence and Eleventh Conference on Innovative Applications of Artificial Intelligence, pages 328–334. AAAI Press / The MIT Press, 1999.
3. B. Chidlovskii, J. Ragetli, and M. de Rijke. Wrapper generation via grammar induction. In 11th European Conference on Machine Learning, ECML’00, pages 96–108, 2000.
4. W. W. Cohen. Recognizing structure in web pages using similarity queries. In Proceedings of the Sixteenth National Conference on Artificial Intelligence and Eleventh Conference on on Innovative Applications of Artificial Intelligence, pages 59–66, 1999.
5. H. Comon, M. Dauchet, R. Gilleron, F. Jacquemard, D. Lugiez, S. Tison, and M. Tommasi. Tree Automata Techniques and Applications. Available on: http://www.grappa.univ-lille3.fr/tata , 1999.