Dodd, Michael B, David F Chapman, Cameron I Ludemann, Wendy Griffiths, Katherine N Tozer, and Liam Donnelly. “The Measurement of Perennial Ryegrass Persistence”. Journal of New Zealand Grasslands 80 (November 26, 2018): 161–168. Accessed June 6, 2026. https://www.nzgajournal.org.nz.myth.agency/index.php/JoNZG/article/view/339.