@article{SM_2002_193_4_a3,
     author = {A. A. Milyutin},
     title = {Conditions for the~non-negativity of integral quadratic forms with constant},
     journal = {Sbornik. Mathematics},
     pages = {531--557},
     year = {2002},
     volume = {193},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_4_a3/}
}