%0 Journal Article
%A N. I. Pol'skii
%T Projective methods in applied mathematics
%J Doklady Akademii Nauk
%D 1962
%P 787-790
%V 143
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_143_4_a9/
%G ru
%F DAN_1962_143_4_a9