%0 Journal Article %A M. M. Simkin %T The physical nature of steady motions in non-linear pulse systems %J Doklady Akademii Nauk %D 1964 %P 1284-1286 %V 159 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_159_6_a23/ %G ru %F DAN_1964_159_6_a23