%0 Journal Article
%A M. S. Agranovich
%T Positive boundary value problems for pseudodifferential operators of first order
%J Funkcionalʹnyj analiz i ego priloženiâ
%D 1968
%P 90-91
%V 2
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FAA_1968_2_1_a6/
%G ru
%F FAA_1968_2_1_a6