@article{Janssen_2011,
title={Graphene,
universality of the quantum Hall effect and redefinition of the SI system},
volume={13},
ISSN={1367-2630},
url={http://dx.doi.org/10.1088/1367-2630/13/9/093026},
DOI={10.1088/1367-2630/13/9/093026},
number={9},
journal={New Journal of Physics},
publisher={IOP Publishing},
author={Janssen,
T J B M and Fletcher,
N E and Goebel,
R and Williams,
J M and Tzalenchuk,
A and Yakimova,
R and Kubatkin,
S and Lara-Avila,
S and Falko,
V I},
year={2011},
month=sep,
pages={093026} }