Gerber, P.J., Steinfeld, H., Henderson, B., Mottet, A., Opio, C., Dijkman, J., Falcucci, A. & Tempio, G. (2013). “Tackling Climate Change Through Livestock”. FAO.org. Food and Agriculture Organization of the United Nations. Aufgerufen am 17.07.2017. http://www.fao.org/3/i3437e.pdf