1. Livestock’s long shadow: environmental issues and options;Steinfeld;Rome: Food and Agriculture Organization of the United Nations, p. xxi,2006
2. Livestock's Long Shadow, Environmental Issues and Options;FAO;Rome,2007
3. Determining the environmental burdens and resource use in the production of agricultural and horticultural commodities;Williams;Main Report,2006
4. Livestock and the Environment: Finding a Balance. Food and Agriculture Organization of the United Nations;de Haan,1997
5. Grazing systems, ecosystem responses and global change;Asner;Annu Rev Environ Resour,2004