@article{MZM_1994_55_4_a12,
     author = {V. I. Chernousov},
     title = {The group of congruence coefficients of a canonical quadratic form and stable rationality of the $PSO$ variety},
     journal = {Matemati\v{c}eskie zametki},
     pages = {114--119},
     publisher = {mathdoc},
     volume = {55},
     number = {4},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1994_55_4_a12/}
}