%0 Journal Article %A F. Sharipov %T Independence of the spectrum of an elliptic operator over a $C^*$-algebra %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1985 %P 87-89 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1985_1_a20/ %G ru %F VMUMM_1985_1_a20