@misc{Cornean_2007,
title={Perturbative vs. variational methods in the study of carbon nanotubes},
ISSN={0271-4132},
url={http://dx.doi.org/10.1090/conm/447/08681},
DOI={10.1090/conm/447/08681},
journal={Contemporary Mathematics},
publisher={American Mathematical Society},
author={Cornean,
Horia D. and Pedersen,
Thomas G. and Ricaud,
Benjamin},
year={2007},
pages={45–55} }