J.J., Jordaan, Rethman N.F.G., and Pieterse P.A. “A Technique to Quantify Available above-Ground Phytomass of Grass Tufts in Defoliation Studies”. African Journal of Range and Forage Science 8, no. 4 (April 1, 1991): 189–192. Accessed October 11, 2026. https://www.ajol.info/index.php/ajrfs/article/view/903.