Hall, N., H. Schonfeldt, and B. Pretorius. “Fatty Acids in Beef from Grain- and Grass-Fed Cattle: The Unique South African Scenario”. South African Journal of Clinical Nutrition, Vol. 29, no. 2, Dec. 2015, pp. 55-62, http://sajcn.co.za/index.php/SAJCN/article/view/1050.