Bauer, G. A., Gebauer, G., Harrison, A. F., Högberg, P., Hogbom, L., Schinkel, H., Taylor, A. F. S., Novak, M., Buzek, F.,
Harkness, D., Persson, T., & Schulze, E.-D. (2000). Biotic and abiotic controls
over ecosystem cycling of stable natural nitrogen, carbon and sulphur isotopes. In Carbon and Nitrogen
Cycling in European Forest Ecosystems (pp. 189-214).