@article{10_4153_CMB_1963_027_7,
     author = {Chalk, J. H. H.},
     title = {Small {Positive} {Values} of {Indefinite} {Quadratic} {Forms}},
     journal = {Canadian mathematical bulletin},
     pages = {331--339},
     year = {1963},
     volume = {6},
     number = {3},
     doi = {10.4153/CMB-1963-027-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1963-027-7/}
}