%0 Journal Article
%A V. A. Arkad'ev
%A A. K. Pogrebkov
%A M. K. Polivanov
%T Expansions with respect to squares, symplectic and poisson structures associated with the Sturm--Liouville problem.~I
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1987
%P 323-339
%V 72
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TMF_1987_72_3_a0/
%G ru
%F TMF_1987_72_3_a0