Assessment of risk and risk-reducing measures related to the introduction and dispersal of the invasive alien carpet tunicate Didemnum vexillum in Norway

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Johanna Järngren, Bjørn Gulliksen, Vivian Husa, Martin Malmstrøm, Eivind Oug, Paul Ragnar Berg, Anders Bryn, Sonya Rita Geange, Kjetil Hindar, Lars Robert Hole, Kyrre Kausrud, Lawrence R. Kirkendall, Anders Nielsen, Brett Kevin Sandercock, Eva Bonsak Thorstad, Gaute Velle