1. Exkursionsflora von Österreich;Adler,1994
2. AGRIDEA, (Eds.). (2006). Handbuch Betrieb und Familie. Basel: Wirz Verlag.
3. Agrargeographie – Strukturzonen und Betriebsformen in der Weltlandwirtschaft;Andreae,1983
4. Aviron, S., Berner, D., Bosshart, S., Buholzer, S., Herzog, F., Jeanneret, Ph., et al. (2005). Butterfly diversity in Swiss grasslands: respective impacts of low-input managemnt, landscape features and region. In R. Lillak, R. Viiralt, A. Linke, V. Gehrman, (Eds.), Integrating efficient grassland farming and biodiversity. Grassland science in Europe, 10, 340–343.
5. Nature management by grazing and cutting;Bakker,1989