Bellarby, J., Tirado, R., Leip, A., Weiss, F., Lesschen, J.-P. & Smith, P. (2012) Livestock greenhouse gas emissions and mitigation potential in Europe. Global Change Biology, 19: pp. 3–18, DOI: 10.1111/j.1365-2486.2012.02786.x
Access publisher’s web-site