Connecticut Agricultural Experiment Station. Plant Disease Information Office.
University of Connecticut. Department of Plant Science and Landscape Architecture.
Louisiana State University Agricultural Center. Research and Extension.
University of Connecticut. Connecticut Invasive Plant Working Group.
University of Tennessee Extension.
University of New Hampshire. Cooperative Extension; New Hampshire Department of Agriculture, Markets & Food.
Tennessee Department of Agriculture.
University of New Hampshire. Cooperative Extension.
Tennessee Wildlife Resources Agency.
Tennessee Invasive Plant Council.