1. Ahlgren, H.L., 1952. Comparisons of the productivity of permanent and rotation pasture on plowable land. In: Proceedings of the Sixth International Grassland Congress, vol. 1. Pennsylvania, pp. 356–362.
2. Anonymous, 1999. Jungviehweiden: 100 kg N pro ha reichen! (Meadows for heifers: 100 kgN per ha do!). Top Agrar 3, 22–24 (in German).
3. Estimating herbage intake from animal performance;Baker,1982
4. Grassland in British agriculture;Barker;Journal of the British Grassland Society,1952
5. A farm scale comparison of permanent and temporary grass;Bastiman;Experimental Husbandry,1971