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Rodwell, John S., Schaminée, Joop H.J., Mucina, Ladislav, Pignatti, Sandro (1930-), Dring, Julian, Moss, D. , 2002. The diversity of european vegetation. An overview of phytosociological alliances and their relationships to EUNIS habitats. National Reference Centre for Agriculture, Nature and Fisheries, Wageningen. 168 pp.