BibTex format
@article{Font:2019:10.1016/j.envpol.2019.01.040,
author = {Font, A and Guiseppin, L and Blangiardo, M and Ghersi, V and Fuller, GW},
doi = {10.1016/j.envpol.2019.01.040},
journal = {is air pollution improving in Paris and London?},
pages = {1--12},
title = {A tale of two cities},
url = {http://dx.doi.org/10.1016/j.envpol.2019.01.040},
volume = {249},
year = {2019}
}