Nonnative invasive plants of Pacific coast forests, by Andrew Gray, Katie Barndt, and Sarah Reichard. USDA Forest Service, Pacific Northwest Research Station, General Technical Report PNW-GTR-817. 2011. 96 p.
Plantae non grata - Invasive species on small woodlands. A webinar presented by Sasha Shaw, King County Noxious Weed Program. Washington State University Extension Forestry, 2020. 1 hour, 25 minutes.