32.
Oenema, O., Bleeker, A., Braathen, N.A., Budnakova, M., Bull, K., Cermak, P., Geupel, M., Hicks, K., Hoft, R. Kozlova, N. 2011. Nitrogen in current European policies. [In:] Sutton, M., Howard, C., Erisman, J., Billen, G., Bleeker, A., Grennfelt, P., Grinsven, H., Grizzetti, B. (Eds.), The European Nitrogen Assessment; Cambridge University Press: Cambridge, UK, 62-81. ISBN 978-1107006126.