@article{10_4153_CMB_1975_022_6,
     author = {Williams, Kenneth S.},
     title = {Note on {Integers} {Representable} by {Binary} {Quadratic} {Forms}},
     journal = {Canadian mathematical bulletin},
     pages = {123--125},
     year = {1975},
     volume = {18},
     number = {1},
     doi = {10.4153/CMB-1975-022-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-022-6/}
}