Before revision: Available: URL LuKII Projekt (2009), Available: URL IUWIS Project (2009), Available: URL DM2E Project (2013), Available: URL re3data.org (2013), Available: URL IBI Website.
After revision: Available: LuKII Projekt (2009), Available: URL IUWIS Project (2009), Available: URL DM2E Project (2013), Available: URL re3data.org (2013), Available: URL IBI Website.