@article{ZVMMF_2002_42_6_a4,
     author = {A. V. Arutyunov and A. F. Izmailov},
     title = {Checking the sign-definiteness of forms},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {800--814},
     publisher = {mathdoc},
     volume = {42},
     number = {6},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2002_42_6_a4/}
}