@article{FPM_2007_13_1_a8,
     author = {V. M. Levchuk and O. A. Starikova},
     title = {A~normal form and schemes of quadratic forms},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {161--178},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2007_13_1_a8/}
}