Forkel, M., Carvalhais, N., Schaphoff, S., von Bloh, W., Migliavacca, M., Thurner, M., Thonicke, K. (2014): Identifying environmental controls on vegetation greenness phenology through model–data integration. - Biogeosciences, 11, 23, 7025-7050.https://doi.org/10.5194/bg-11-7025-2014