Wallace, I.A., J.PJ. Eerens, A. Rahman, and B.D. Clarkson. “Horizontal Seed Dispersion Patterns of Californian Thistle (<i>Cirsium arvense</i≫)”. New Zealand Plant Protection 58 (August 1, 2005): 148–151. Accessed December 6, 2021. https://journal.nzpps.org/index.php/nzpp/article/view/4320.