1. Angluin, D., Smith, C.H.: A survey of inductive inference: Theory and methods. Computing Surveys 15, 237–269 (1983)
2. Angluin, D., Smith, C.H.: Inductive inference. In: Shapiro, S.C. (ed.) Encyclopedia of Artificial Intelligence, 2nd edn., vol. 1, pp. 672–682. John Wiley & Sons, Inc., Chichester (1992)
3. Chidlovskii, B.: Information extraction from tree documents by learning subtree delimiters. In: Kambhampati, S., Knoblock, C.A. (eds.) Proceedings of IJCAI 2003 Workshop on Information Integration on the Web (IIWeb 2003), Acapulco, Mexico, August 9-10, pp. 3–8 (2003)
4. Gold, E.M.: Limiting recursion. Journal of Symbolic Logic 30, 28–48 (1965)
5. Gold, E.M.: Language identification in the limit. Information and Control 10, 447–474 (1967)