BibTex format
@article{Rognes:2013:10.5194/gmd-6-2099-2013,
author = {Rognes, ME and Ham, DA and Cotter, CJ and McRae, ATT},
doi = {10.5194/gmd-6-2099-2013},
journal = {Geoscientific Model Development},
pages = {2099--2119},
title = {Automating the solution of PDEs on the sphere and other manifolds in FEniCS 1.2},
url = {http://dx.doi.org/10.5194/gmd-6-2099-2013},
volume = {6},
year = {2013}
}