Nielsen C, Ravn HP, Nentwig W & Wade M (eds.) (2005) The Giant Hogweed Best Practice Manual. Guidelines for the management and control of an invasive weed in Europe. – Forest and Landscape Denmark, Hoersholm, 44 pp.

Nielsen C, Ravn HP, Nentwig W & Wade M (eds.) (2005) The Giant Hogweed Best Practice Manual. Guidelines for the management and control of an invasive weed in Europe. – Forest and Landscape Denmark, Hoersholm, 44 pp.