%0 Journal Article %A A. G. Brusentsev %T The spectrum of nonselfadjoint elliptic systems of arbitrary order %J Differencialʹnye uravneniâ %D 1976 %P 1040-1051 %V 12 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_6_a10/ %G ru %F DE_1976_12_6_a10