%0 Journal Article %A A. A. Lokshin %A E. A. Sagomonyan %T Application of a pseudodifferential operator for estimating the rate of wave propagation in a problem in mechanics %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1989 %P 87-89 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1989_2_a24/ %G ru %F VMUMM_1989_2_a24