%0 Journal Article
%A P. V. Anikeyev
%T On symmetry fields of second degree in the momenta of geodesic flows on a two-dimensional sphere
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1997
%P 29-32
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1997_4_a8/
%G ru
%F VMUMM_1997_4_a8