@article{10_4153_CMB_1967_082_0,
     author = {Nobusawa, Nobuo},
     title = {On the {Distribution} of {Integer} {Solutions} of f(x, y) = z2 for a {Definite} {Binary} {Quadratic} {Form} f},
     journal = {Canadian mathematical bulletin},
     pages = {755--756},
     year = {1967},
     volume = {10},
     number = {5},
     doi = {10.4153/CMB-1967-082-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1967-082-0/}
}