@article{10_1017_S0017089500001397,
     author = {Brown, Ezra},
     title = {Discriminantal divisors and binary quadratic forms},
     journal = {Glasgow mathematical journal},
     pages = {69--73},
     year = {1972},
     volume = {13},
     number = {1},
     doi = {10.1017/S0017089500001397},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500001397/}
}