1. Agro Business Consultants Ltd., 2003. The Agricultural Budgeting and Costing Book. Agro Business Consultants Ltd., Melton Mobray, UK
2. The impact of grazing on plant communities;Bakker,1998
3. Some effects of grazing on vegetation dynamics in the Camarge, France;Basset;Vegetatio,1980
4. Conservation of reed beds and their avifauna in England and Wales;Bibby;Biological Conservation,1982
5. Population studies of Vertigo moulinsiana Dupuy in Denmark;Bondesen;Natura Jutlandica,1966