Web Ontology Management Application. - Tobias Häusser; Maxim Mirochnitchenko; Marc Rindermann (MuC, 2003)

Extracting Investor Sentiment from Weblog Texts: A Knowledge-based Approach. - Achim Klein; Olena Altuntas; Tobias Häusser; Wiltrud Kessler (CEC, 2011)