BibTex format
@article{Cotter:2013:10.1098/rspa.2012.0678,
author = {Cotter, CJ and Holm, DD},
doi = {10.1098/rspa.2012.0678},
journal = {Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences},
title = {A variational formulation of vertical slice models},
url = {http://dx.doi.org/10.1098/rspa.2012.0678},
volume = {469},
year = {2013}
}