BibTex format
@article{Elbeshausen:2013:10.1002/2013JE004477,
author = {Elbeshausen, D and Wünnemann, K and Collins, GS},
doi = {10.1002/2013JE004477},
journal = {Journal of Geophysical Research: Planets},
pages = {22952309--22952309},
title = {The transition from circular to elliptical impact craters},
url = {http://dx.doi.org/10.1002/2013JE004477},
volume = {118},
year = {2013}
}