BibTex format
@article{Powell:2010:10.1103/PhysRevLett.104.255303,
author = {Powell, S and Barnett, R and Sensarma, R and Das, Sarma S},
doi = {10.1103/PhysRevLett.104.255303},
journal = {Physical Review Letters},
pages = {255303--255303},
title = {Interacting Hofstadter spectrum of atoms in an artificial gauge field},
url = {http://dx.doi.org/10.1103/PhysRevLett.104.255303},
volume = {104},
year = {2010}
}