%0 Journal Article
%A K. K. Lavrent'ev
%T Inverse problems of the finding boundary condition in the theory of propagation of nonstationary waves.~II
%J Zapiski Nauchnykh Seminarov POMI
%D 1975
%P 129-133
%V 51
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1975_51_a7/
%G ru
%F ZNSL_1975_51_a7