%0 Journal Article
%A A. Dzhuraev
%T Boundary value problems for systems of second order equations of composite type which have one multiple family of real characteristics
%J Doklady Akademii Nauk
%D 1969
%P 1002-1005
%V 186
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_186_5_a3/
%G ru
%F DAN_1969_186_5_a3