@article{VMUMM_1997_6_a18,
     author = {A. I. Kozko},
     title = {On an extremal problem for polynomials in a multi-dimensional case},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {66--68},
     publisher = {mathdoc},
     number = {6},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1997_6_a18/}
}