Additional information
- Invasive Species Program - Minnesota Department of Natural Resources
- Terrestrial Invasive Plant Early Detection Program - Minnesota Department of Agriculture
- Minnesota Noxious Weed Program - Minnesota Department of Agriculture
- Field Guide to Invasive Plants of Wisconsin
- Wisconsin Department of Natural Resources - Mistaken Identity? Invasive Plants and their Native Look-alikes
- Videos on Identification of Invasive Species - University of Wisconsin - Extension
- A Guide to Nonnative Invasive Plants Inventoried in the North by Forest Inventory and Analysis - USDA Forest Service
- Minnesota's Forest Invaders: A guide to invasive species - SFI
- Minnesota Noxious Weeds (MN DOT)
- Invasive Plant Fact Sheets - US Forest Service
- Weeds Gone Wild - Plant Conservation Alliance
- Invasive Plant Information - Center for Invasive Species and Ecosystem Health
- Noxious Weed Profiles - by Thomas J. Elpel
- Guide to Invasive Cooperative Weed Management Areas (CWMAs) in Minnesota - Minnesota Board of Water and Soil Resources
- Weeds of Nebraska and the Great Plains, James Stubendieck and Geir Friisoe, Nebraska Department of Agriculture, 1994/95
- Biology and Management of Noxious Rangeland Weeds, 1999, edited by Roger L. Sheley and Janet K. Petroff, Oregon State University Press, Corvallis