@article{GDZPPN002069075,
title = {Liouville integrability of geometric variational problems.},
journal = {Commentarii mathematici Helvetici},
volume = {69},
year = {1994},
pages = {272-280},
zbl = {0819.58017},
url = {http://dml.mathdoc.fr/item/GDZPPN002069075}
}
Langer, J.; Singer, D. Liouville integrability of geometric variational problems.. Commentarii mathematici Helvetici, Tome 69 (1994) pp. 272-280. http://gdmltest.u-ga.fr/item/GDZPPN002069075/