Fraser, T.J., S. Dennis, R.A. Moss, K.N. Tozer, N.R. Stocker, A.L. Taylor, M.J. Faville, and C. Smith. “Long Term Effect of Superphosphate Fertilisers on Pasture Persistence”. NZGA: Research and Practice Series 15 (January 1, 2011): 93–97. Accessed June 7, 2026. https://www.nzgajournal.org.nz/index.php/rps/article/view/3210.