@article{MZM_1967_1_3_a0,
     author = {B. N. Delone and S. S. Ryshkov and M. I. Shtogrin},
     title = {A theorem due to {Sandakova} concerning positive quadratic forms},
     journal = {Matemati\v{c}eskie zametki},
     pages = {253--262},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1967_1_3_a0/}
}