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J. Jacobs, H. Schulte-Mattler, and G. Weinrich, Eds, Early Warning Indicators and Risk Management. Lüneburg: Leuphana University, 2010 [Online]. Available: https://www.leuphana.de/fileadmin/user_upload/Forschungseinrichtungen/ics/files/FInAL/2010/FINAL-04-2010-3.pdf