Harrington, K.C., A. Thatcher, and P.D. Kemp. “Mineral Composition and Nutritive Value of Some Common Pasture Weeds”. New Zealand Plant Protection 59 (August 1, 2006): 261–265. Accessed October 24, 2021. https://journal.nzpps.org/index.php/nzpp/article/view/4414.