Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.
Barataria-Terrebonne National Estuary Program.
Convention on Biological Diversity. Clearing-House Mechanism; Palau Office of Environmental Response and Coordination.
Missouri Department of Conservation.
See also: For more information about Invasive Tree Pests (insects and diseases) that are not native to Missouri
Louisiana Department of Wildlife and Fisheries.
Encyclopedia of New Zealand.
Montana Fish, Wildlife, and Parks.