1. D. Angluin. Finding patterns common to a set of strings. Journal of Computer and System Sciences, 21:46–62, 1980.
2. D. Angluin. Inductive inference of formal languages from positive data. Information and Control, 45:117–135, 1980.
3. D. Angluin. Queries and concept learning. Machine Learning, 2:319–342, 1988.
4. T. Erlebach, P. Rossmanith, H. Stadtherr, A. Steger, and T. Zeugmann. Efficient Learning of One-Variable Pattern Languages from Positive Data. DOI-TR-128, Department of Informatics, Kyushu University, Dec. 12, 1996; http://www.i.kyushuu.ac.jp/ thomas/treport.html.
5. G. Filé. The relation of two patterns with comparable languages. In Proc. 5th Ann. Symp. Theoretical Aspects of Computer Science, LNCS 294, pp. 184–192, Berlin, 1988. Springer-Verlag.