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Supported by the Deutsche Forschungsgemeinschaft, SPP Biologie der Zeitmessung.
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Gwinner, E. Photoperiodic synchronization of circannual rhythms in the European starling (Sturnus vulgaris). Naturwissenschaften 64, 44–45 (1977). https://doi.org/10.1007/BF00439901
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DOI: https://doi.org/10.1007/BF00439901