Media type: E-Article Title: Classifying web documents in a hierarchy of categories: a comprehensive study Contributor: Ceci, Michelangelo; Malerba, Donato Published: Springer Science and Business Media LLC, 2007 Published in: Journal of Intelligent Information Systems, 28 (2007) 1, Seite 37-78 Language: English DOI: 10.1007/s10844-006-0003-2 ISSN: 0925-9902; 1573-7675 Origination: Footnote: