Hammond, Tony and Hannay, Timo and Lund, Ben and Scott, Joanna. Social Bookmarking Tools (I): A General Review. In D-Lib Magazine, (11) 4: Year 2005.

Lund, Ben and Hammond, Tony and Flack, Martin and Hannay, Timo. Social Bookmarking Tools (II): A Case Study - Connotea. In D-Lib Magazine, (11) 4: Year 2005.

Tane, Julien and Schmitz, Christoph and Stumme, Gerd and Staab, Steffen and Studer, R.. The Courseware Watchdog: an Ontology-based tool for finding and organizing
learning material. Mobiles Lernen und Forschen - Beiträge der Fachtagung an der Universität. editor(s) David, Klaus and Wegner, Lutz. 93-104, Kassel University Press, Year 2003.