%0 Journal Article
%A Ya. A. Roitberg
%A Z. G. Sheftel
%T Energy inequalities for elliptic operators with discontinuous coefficients and for general boundary conditions and conjugacy conditions
%J Doklady Akademii Nauk
%D 1963
%P 531-533
%V 148
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_148_3_a12/
%G ru
%F DAN_1963_148_3_a12