%0 Journal Article
%A V. S. Ryaben'kii
%T Generalization of Calder\'on projections and boundary equations on the basis of the notion of precise trace
%J Doklady Akademii Nauk
%D 1983
%P 288-292
%V 270
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1983_270_2_a7/
%G ru
%F DAN_1983_270_2_a7