Hall, Nicolette, Hettie Schonfeldt, and Beulah Pretorius. 2015. “Fatty Acids in Beef from Grain- and Grass-Fed Cattle: The Unique South African Scenario”. South African Journal of Clinical Nutrition 29 (2), 55-62. http://sajcn.co.za/index.php/SAJCN/article/view/1050.