BibTex format
@article{Graham:2008:10.1016/j.bpobgyn.2007.12.001,
author = {Graham, WJ and Foster, LB and Davidson, L and Hauke, E and Campbell, OMR},
doi = {10.1016/j.bpobgyn.2007.12.001},
journal = {BEST PRACTICE & RESEARCH CLINICAL OBSTETRICS & GYNAECOLOGY},
pages = {425--445},
title = {Measuring progress in reducing maternal mortality},
url = {http://dx.doi.org/10.1016/j.bpobgyn.2007.12.001},
volume = {22},
year = {2008}
}