Plant Ecology, Herbivory, and Human Impact in Nordic Mountain Birch Forests - Caldwell, M. M.; Heldmaier, G.; Jackson, R. B.; Karlsson, Staffan; Lange, O. L.; Mooney, H. A.; Neuvonen, Seppo; Schulze, E. -D; Sommer, U.; Thannheiser, Dietbert; Wielgolaski, Frans E. (Springer Berlin Heidelberg, 2005)