1. Long-term changes in basic water chemistry in some Swedish regions;Andersson,1980
2. Cycles, forms and availability of phosphorus in fresh water;Blazˇka,1989
3. Cycles, forms and availability of phosphorus in fresh water;Blazˇka,1989
4. Factors affecting mass transport of nutrients from farm land;Brink,1986
5. Losses of nitrogen, phosphorus and potassium from arable land;Brink;Ekohydrologi No. 4,1978