%0 Journal Article %A S. P. Belinskii %T A certain inverse problem for linear symmetric $t$-hyperbolicsystems with $n+1$ independent variables %J Differencialʹnye uravneniâ %D 1976 %P 15-23 %V 12 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_1_a1/ %G ru %F DE_1976_12_1_a1