Smetham, M.L., and B.S. Dear. “The Effect of Continuous Grazing on the Seed Production of Subterranean Clover (Trifolium subterraneum)”. NZGA: Research and Practice Series 11 (January 1, 2003): 155–160. Accessed June 12, 2026. https://www.nzgajournal.org.nz/index.php/rps/article/view/3013.