%0 Journal Article %A L. A. Sakhnovich %T Extremal Trigonometric and Power Polynomials in Several Variables %J Funkcionalʹnyj analiz i ego priloženiâ %D 2004 %P 88-91 %V 38 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_2004_38_1_a9/ %G ru %F FAA_2004_38_1_a9