1. Alfnes , E. Førland , E.J. 2006 Trends in extreme precipitation and return values in Norway
2. Bechmann , M. 2008 Soil phosphorus status and effects on water quality at the catchment scale in Norway http://www.njf.nu/filebank/files/20081102$204905$fil$Ez3sPFGB2C7e9eIGdJ7D.pdf
3. Bechmann , M. Eggestad , H.O. Våje , P.I. Stålnacke , P. Vagstad , N. 1999 The Agricultural Environmental Programme in Norway
4. Beldring , S. 2008 Distributed Element Water Balance Model System