Sippel, S., El Madany, T.S., Migliavacca, M., Mahecha, M.D., Carrara, A., Flach, M., Kaminski, T., Otto, F., Thonicke, K., Vossbeck, M., Reichstein, M. 2018. 16. Warm winter, wet spring, and an extreme response in ecosystem functioning on the Iberian Peninsula. Bulletin of the American Meteorological Society, 99:80-85.