BibTex format
@article{Allwood:2010:10.1016/j.entcs.2010.08.028,
author = {Allwood, TOR and Eisenbach, S},
doi = {10.1016/j.entcs.2010.08.028},
journal = {Electronic Notes in Theoretical Computer Science},
pages = {3--18},
title = {Strengthening the zipper},
url = {http://dx.doi.org/10.1016/j.entcs.2010.08.028},
volume = {253},
year = {2010}
}