BibTex format
@article{Daniel:2007:10.1016/j.jue.2006.10.001,
author = {Daniel, J Graham},
doi = {10.1016/j.jue.2006.10.001},
journal = {Journal of Urban Economics},
pages = {103--120},
title = {Variable returns to agglomeration and the effect of road traffic congestion},
url = {http://dx.doi.org/10.1016/j.jue.2006.10.001},
volume = {62},
year = {2007}
}