@article{TM_1978_148_a19,
     author = {A. V. Roiter},
     title = {Roots of integral quadratic forms},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {201--210},
     publisher = {mathdoc},
     volume = {148},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1978_148_a19/}
}