Zeitschriftenartikel
Hobbie, E. A.; Olszyk, D. M.; Rygiewicz, P. T.; Tingey, D. T.; Johnson, M. G.: Foliar nitrogen concentrations and natural abundance of
15N suggest nitrogen allocation patterns of Douglas-fir and mycorrhizal fungi during development in elevated carbon dioxide concentration and temperature. Tree Physiology
21 (15), S. 1113 - 1122 (2001)