%0 Journal Article
%A J. Langer
%A D. Singer
%T Liouville integrability of geometric variational problems.
%J Commentarii mathematici Helvetici
%D 1994
%P 272-280
%V 69
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1994__69_4_140338/
%F CMH_1994__69_4_140338