%0 Journal Article %A N. A. Izobov %T The absence of real multipliers for an $n$-dimensional periodic system of order $4m+2$ %J Differencialʹnye uravneniâ %D 1977 %P 1581-1587 %V 13 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1977_13_9_a3/ %G ru %F DE_1977_13_9_a3