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2. Periodenanalyse von Aktivitätsrhythmen bei Carcinus maenas;Blume;Biol. Zbl.,1962
3. A hypothesis for extrinsic timing of circadian rhythms;Brown;Can. J. Bot.,1969
4. Evidence for external timing of biological clocks;Brown,1976
5. Die subjective Photometrie farbiger Lichter;Dresler;Naturwissenschaften,1941