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Zürcher, Ernst; Schlaepfer, Rodolphe (2014). Lunar Rhythmicities in the Biology of Trees, Especially in the Germination of European Spruce (Picea abies Karst.): A New Statistical Analysis of Previously Published Data Journal of Plant Studies, 3(1), pp. 103-113. 10.5539/jps.v3n1p103