Macfarlane, M., E. Crofoot, and P. Muir. “Effects of Closing Date on Seeding and Hardseededness of Balansa, Gland, Persian and Arrowleaf Clovers on East Coast Dryland”. Journal of New Zealand Grasslands, vol. 77, Jan. 2015, pp. 219-26, doi:10.33584/jnzg.2015.77.461.