@article{MZM_1981_29_1_a7,
     author = {S. V. Konyagin},
     title = {Systems of vectors in {Euclidean} space and an extremal problem for polynomials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {63--74},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1981_29_1_a7/}
}