@article{JEMS_2009_11_6_a7,
     author = {Rupert L. Frank and Michael Loss and Timo Weidl},
     title = {P\'olya's conjecture in the presence of a constant magnetic field},
     journal = {Journal of the European Mathematical Society},
     pages = {1365--1383},
     publisher = {mathdoc},
     volume = {11},
     number = {6},
     year = {2009},
     doi = {10.4171/jems/184},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/184/}
}