%0 Journal Article %A V. G. Alekseev %T Symmetry properties of higher spectral densities of stationary random processes %J Matematičeskie zametki %D 1987 %P 758-763 %V 41 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1987_41_5_a14/ %G ru %F MZM_1987_41_5_a14