BibTex format
@article{Graham:2016:10.1016/j.aap.2016.04.007,
author = {Graham, DJ and Li, H},
doi = {10.1016/j.aap.2016.04.007},
journal = {Accident Analysis & Prevention},
pages = {65--74},
title = {Quantifying the causal effects of 20 mph zones on road casualties in London via doubly robust estimation},
url = {http://dx.doi.org/10.1016/j.aap.2016.04.007},
volume = {93},
year = {2016}
}