Sutton, M. A., Nemitz, E., Skiba, U. M., Beier, C., Butterbach-Bahl, K., Cellier, P., de Vries, W., Erisman, J. W., Reis, S., Bleeker, A., Bergamaschi, P., Calanca, P. L., Cotrufo, M. F.
, Dalgaard, T., Duyzer, T., Gundersen, P., Hensen, A., Kros, J., Leip, A. ... Schleppi, P. (2011).
The nitrogen cycle and its influence on the European greenhouse gas balance. Centre for Ecology & Hydrology.
http://www.ceh.ac.uk/products/publications/documents/Nitrobrochure_lowres.pdf
Razzaghi, F., Ahmadi, S. H., Jensen, C. R., Jacobsen, S.-E.
& Andersen, M. N. (2011).
The salt tolerance of Quinoa measured under field conditions. Afhandling præsenteret på IICID 21st International Congress on Irrigation and Drainage, Tehran, Iran.