%0 Journal Article %A K. Kh. Boimatov %T Spectral asymptotics of linear and nonlinear pencils of pseudodifferential operators that are elliptic in the Douglis--Nirenberg sense %J Doklady Akademii Nauk %D 1992 %P 441-445 %V 322 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1992_322_3_a0/ %G ru %F DAN_1992_322_3_a0