%0 Journal Article %A M. P. Mikhailova %T Motion of a piston with constant velocity in an inhomogeneous medium %J Doklady Akademii Nauk %D 1961 %P 826-828 %V 141 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_141_4_a15/ %G ru %F DAN_1961_141_4_a15