@article{Bechle2011,
author = {Bechle, M.J. and Millet, D.B. and Marshall, J.D.},
title= {Effects of income and urban form on urban NO2: Global evidence from satellites},
year = {2011},
doi = {10.1021/es103866b},
journal = {Environmental Science and Technology},
volume = {45},
number = {11},
pages = {4914--4919},
}