BibTex format
@article{Lawn:2008:10.1016/j.geomphys.2008.01.007,
author = {Lawn, M-A},
doi = {10.1016/j.geomphys.2008.01.007},
journal = {Journal of Geometry and Physics},
pages = {683--700},
title = {Immersions of Lorentzian surfaces in R2,1},
url = {http://dx.doi.org/10.1016/j.geomphys.2008.01.007},
volume = {58},
year = {2008}
}