@article{TM_1997_218_a15,
     author = {L. A. Kogan},
     title = {Representation of numbers by quadratic forms},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {248--261},
     publisher = {mathdoc},
     volume = {218},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1997_218_a15/}
}