%0 Journal Article %A A. V. Belonosova %T An inverse kinematic problem of seismics for two-dimensional medium %J Doklady Akademii Nauk %D 1972 %P 572-575 %V 202 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_202_3_a20/ %G ru %F DAN_1972_202_3_a20