TagPlus: A Retrieval System using Synonym Tag in Folksonomy. Proceedings of the 2007 International Conference on Multimedia and Ubiquitous Engineering, 294--298, IEEE Computer Society, Washington, DC, USA, 2007. [PUMA: folksonomy information_retrieval ol_web2.0 synonyms methods_synonyms] URL
Calculating Relevancy when Searching in Semantically and Hierarchically Structured Data as Exemplified with the eZ Publish Enterprise Content Management System�s Internal Search Engine. Januar 2007. [PUMA: information_retrieval diplomarbeit xml ranking]