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Robert, Henri, Lafontaine, René-Marie, Beudels-Jamar, Roseline C., Delsinne, Thibaut , 2013. Risk analysis of the Water Pennywort Hydrocotyle ranunculoides (L.F., 1781). Royal Belgian Institute of Natural Sciences for the Federal Public Service Health, Food chain safety and Environment, Bruxelles (Belgique). 59 pp.