%0 Journal Article
%A M. A. Grinfel'd
%T A new problem of mathematical physics which is connected with the
%J Doklady Akademii Nauk
%D 1984
%P 72-76
%V 279
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1984_279_1_a16/
%G ru
%F DAN_1984_279_1_a16