King, Warren, Shirley Nichols, and Jim Crush. “Future Northland Pastures: 2. C4 Grasses and Subtropical Legumes for a Future Northland”. Journal of New Zealand Grasslands 87 (November 7, 2025): 43–49. Accessed April 17, 2026. https://www.nzgajournal.org.nz/index.php/JoNZG/article/view/3760.