%0 Journal Article
%A E. I. Gordon
%T I.~I.~Gordon who was an adressee of L.~S.~Pontryagin (introductory notes)
%J Vladikavkazskij matematičeskij žurnal
%D 2019
%P 90-98
%V 21
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMJ_2019_21_4_a7/
%G en
%F VMJ_2019_21_4_a7