%0 Journal Article
%T Greetings to L.\,S.~Pontryagin on his seventieth birthday
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1983
%P 142
%V 38
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1983_38_6_a19/
%G en
%F RM_1983_38_6_a19