BibTex format
@article{Couto:2008:10.1007/s10258-008-0030-8,
author = {Couto, A and Graham, DJ},
doi = {10.1007/s10258-008-0030-8},
journal = {PORTUGUESE ECONOMIC JOURNAL},
pages = {125--153},
title = {The contributions of technical and allocative efficiency to the economic performance of European railways},
url = {http://dx.doi.org/10.1007/s10258-008-0030-8},
volume = {7},
year = {2008}
}