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By: Hagedorn, Gregor - Mietchen, Daniel - Morris, Robert - Agosti, Donat - Penev, Lyubomir - Berendsohn, Walter G., - Hobern, DonaldType: ArticleIn: ZooKeysVolume: 150Series:Issue:Date: 2011Page Range: 127-149Publication Info: Pensoft Publishers 2011Subjects: Creative Commons data sharing Europeana Licensing Non-profit open access Open Content Open Educational Resources Software Licenses