Media type: E-Article Title: Estimating the size and evolution of categorised topics in web directories Contributor: Anagnostopoulos, Ioannis; Anagnostopoulos, Christos-Nikolaos imprint: IOS Press, 2010 Published in: Web Intelligence and Agent Systems: An International Journal Language: Not determined DOI: 10.3233/wia-2010-0179 ISSN: 1570-1263 Keywords: Artificial Intelligence ; Computer Networks and Communications ; Software Origination: Footnote: