Groenteman, R., D. Kelly, S.V. Fowler, and G.W. Bourd?t. “Interactions Between Nodding Thistle Seed Predators”. New Zealand Plant Protection 60 (August 1, 2007): 152–157. Accessed March 30, 2023. https://journal.nzpps.org/index.php/nzpp/article/view/4674.