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Social Bookmarking Tools (I): A General Review. D-Lib Magazine, (11)4April 2005. [PUMA: bookmarking collaborative folksonomy iccs_example social tagging tool trias_example] URL
The Courseware Watchdog: an Ontology-based tool for finding and organizing learning material. In Klaus David, und Lutz Wegner (Hrsg.), Mobiles Lernen und Forschen - Beiträge der Fachtagung an der Universität, 93-104, Kassel University Press, November 2003. [PUMA: iccs_example learning ol_tut2010 ontology tool trias_example] URL