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2. Habitat selection and diet composition of Greylag Geese Anser anser and Barnacle Geese Branta leucopsis during fall and spring staging in relation to management in the tidal marshes of the Dollard;Aerts;Zeitschrift für Ökologie und Naturschutz,1996
3. Agricultural Research Council, 1980. The Nutrient Requirements of Ruminant Livestock. HMSO, London.
4. Coastal saltmarshes: their nature and importance;Allen,1992
5. Long-term changes of salt marsh communities by cattle grazing;Andresen;Vegetatio,1990