@article{shenghui2016a, title = {A hybrid method for quantifying China's nitrogen footprint during urbanisation from 1990 to 2009} author = {Shenghui Cui and Yalan Shi and Arunima Malik and Manfred Lenzen and Bing Gao and Wei Huang}, journal = {Environment International}, doi = {10.1016/j.envint.2016.08.012}, year = {2016} }