1. Almeida JD, Freitas H (2001) The exotic and invasive flora of Portugal. Bot Compl 25:317–327
2. Almeida JD, Freitas H (2006) Exotic naturalized flora of continental Portugal-A reassessment. Bot Compl 30:117–130
3. Asner G, Martin R, Knapp D, Kennedy-Bowdoin T (2009) Effects of Morella faya tree invasion on aboveground carbon storage in Hawaii. Biol Invasions 12:447–494
4. Bohn U, Neuhäusl R, Gollub G, Hettwer C, Neuhäusl Z, Schlüter H, Weber H (2003) Map of the natural vegetation of Europe. Scale 1: 2 500 000. Landwirtschaftsverlag, Münster
5. Chytrý M, Pysek P, Wild J, Pino J, Maskell LC, Vila M (2009) European map of alien plant invasions based on the quantitative assessment across habitats. Divers Distrib 15:98–107