Hanspach, J., Kühn, I., Schweiger, O., Pompe, S., Klotz, S. (2011) Geographical patterns in prediction error of species distribution modelsGlobal Ecology and Biogeography 20 (5): 779-788. http://onlinelibrary.wiley.com/doi/10.1111/j.1466-8238.2011.00649.x/abstract