1. Natural and human effects on trophic evolution;Ahl;Arch. Hydrobiol. Beih.,1979
2. Nitrogen and phosphorus budgets and the role of sediments in six shallow Danish lakes;Andersen;Arch. Hydrobiol.,1974
3. Production and decomposition of organic matter in eutrophic Frederiksborg Slotssø, Denmark;Andersen;Arch Hydrobiol.,1979
4. Hydrografiske og sedimentologiske forhold i Furesø og Mølleå;Jacobsen,1973
5. Production, isolation, and nutrient budget of eutrophic Lake Esrom;Jonasson;Oikos,1974