%0 Journal Article
%A M. M. Lavrent'ev
%T On an inverse problem for the wave equation
%J Doklady Akademii Nauk
%D 1964
%P 520-521
%V 157
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1964_157_3_a5/
%G ru
%F DAN_1964_157_3_a5