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Wikelski, M.; Müller, U.; Heidrich, W. A.; Kuemmeth, F. X.: Patent: Method for forecasting e.g. major volcanic event, involves generating test profile representing physiological status of animal, calculating ratio between test profile and reference profile, and setting alert if ratio reaches threshold value. Patent-Nr.: WO2013167661-A2; WO2013167661-A3; EP2847622-A2; US2015153477-A1, Max Planck Ges zur Foerderung der Wissenschaften, (2013)