• Risk assessment of phosphorus loss from agriculture in the Nordic and Baltic countries using the P index approachBechmann, Marianne; Deelstra, Johannes; Iital, Arvo; Jansons, ViestursXXIII Nordic Hydrological Conference ["Fresh Water Resources Management"] : Tallinn, Estonia, 8-12 August 2004 : selected articles. Vol. I2004 / p. 159-168 : ill https://artiklid.elnet.ee/record=b2343294*est