Hvor Ugras
Nord-Amerika | Weed Science Society of America (2010) - Composite List of Weeds |
Caribbean | CABI - Invasive Species Compendium |
Europa | F. Verloove (2006) |
Øst-Asia | T. Mito & T. Uesugi (2004) - Invasive Alien Species in Japan |
Australia | Weeds of Australia - Biosecurity Queensland Edition |