@article {Leip2014, title = {{The nitrogen footprint of food products in the European Union}}, journal = {The Journal of Agricultural Science}, volume = {152}, number = {S1}, year = {2014}, month = {oct}, pages = {20{\textendash}33}, keywords = {Footprint, mypublications, nitrogen, online}, issn = {0021-8596}, doi = {10.1017/S0021859613000786}, url = {http://www.journals.cambridge.org/abstract{\_}S0021859613000786}, author = {Leip, Adrian and Weiss, Franz and Lesschen, Jan Peter and Westhoek, Henk} }