Solskinnsbakk, Geir ; Gulla, Jon ; Meersman, Robert (Bearb.) ; Dillon, Tharam (Bearb.) ; Herrero, Pilar (Bearb.): A Hybrid Approach to Constructing Tag Hierarchies In: On the Move to Meaningful Internet Systems, OTM 2010. 6427. Berlin / Heidelberg : Springer, 2010 Lecture Notes in Computer Science). - ISBN-978-3-642-16948-9, S. 975-982