Klages, S., Heidecke, C., Osterburg, B., Bailey, J., Calciu, I., Casey, C.
, Dalgaard, T., Frick, H., Glavan, M., D'Haene, K., Hofman, G., Leitão, I. A., Surdyk, N., Verloop, K. & Velthof, G. (2020).
Nitrogen surplus-a unified indicator for water pollution in Europe? Water (Switzerland),
12(4), Artikel 1197.
https://doi.org/10.3390/W12041197