1. Map of the Natural Vegetation of Europe;Bohn,2000
2. Braat, L., ten Brink, P. (Eds.), 2007. The Cost of Policy Inaction. The case of not meeting the 2010 biodiversity target. European Commission, DG Environment ENV.G.1/ETU/2007/0044 (Official Journal reference: 2007/S 95-116033).
3. Plant Sociology the Study of Plant Communities;Braun-Blanquet,1932
4. Habitat conservation;Bunce,1999
5. A standardized procedure for surveillance and monitoring European habitats and provision of spatial data;Bunce;Landsc. Ecol.,2008