USSHER, G.; HUME, D. Sustainable perennial pastures in Northland. Journal of New Zealand Grasslands, [S. l.], v. 77, p. 141–146, 2015. DOI: 10.33584/jnzg.2015.77.489. Disponível em: https://www.nzgajournal.org.nz/index.php/JoNZG/article/view/489. Acesso em: 16 oct. 2026.