@article{Graham:2008:10.1016/j.tre.2006.04.001,
author = {Graham, DJ},
doi = {10.1016/j.tre.2006.04.001},
journal = {TRANS RES E},
pages = {84--99},
title = {The productive efficiency of urban railways: parametric and non-parametric estimates},
url = {http://dx.doi.org/10.1016/j.tre.2006.04.001},
volume = {44},
year = {2008}
}

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TY  - JOUR
AU  - Graham,DJ
DO  - 10.1016/j.tre.2006.04.001
EP  - 99
PY  - 2008///
SP  - 84
TI  - The productive efficiency of urban railways: parametric and non-parametric estimates
T2  - TRANS RES E
UR  - http://dx.doi.org/10.1016/j.tre.2006.04.001
VL  - 44
ER  - 

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