1. Grefenstette, G.: Comparing two language identification schemes. In: Proceedings of the 3rd International Conference on Statistical Analysis of Textual Data (1995)
2. Lang, H.C.: A tolerance rough set approach to clustering web search results. Faculty of Mathematics, Informatics and Mechanics, Warsaw University (2004)
3. Schockaert, S.: Het clusteren van zoekresultaten met behulp van vaagmieren (clustering of search results using fuzzy ants). Master thesis, University of Ghent (2004)
4. Zamir, O.: Clustering Web Documents: A Phrase-Based Method for Grouping Search Engine Results. PhD thesis, University of Washington (1999)
5. Advances in Soft Computing;S. Osiński,2004