@article{10_4153_CMB_2003_004_1,
     author = {B\"ulow, Tommy},
     title = {Power {Residue} {Criteria} for {Quadratic} {Units} and the {Negative} {Pell} {Equation}},
     journal = {Canadian mathematical bulletin},
     pages = {39--53},
     year = {2003},
     volume = {46},
     number = {1},
     doi = {10.4153/CMB-2003-004-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2003-004-1/}
}