%0 Journal Article
%A M. I. Belishev
%A S. A. Ivanov
%T Characterization of data in the dynamical inverse problem for two-velocity system
%J Zapiski Nauchnykh Seminarov POMI
%D 1999
%P 19-45
%V 259
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1999_259_a1/
%G ru
%F ZNSL_1999_259_a1