Smith, Jimmy, Shirley Tarawali, Delia Grace, and Keith Sones. 2013. “Feeding the World in 2050: Trade-Offs, Synergies and Tough Choices for the Livestock Sector”. Tropical Grasslands-Forrajes Tropicales 1 (2):125-36. https://doi.org/10.17138/tgft(1)125-136.