Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1994__69_4_140338, author = {J. Langer and D. Singer}, title = {Liouville integrability of geometric variational problems.}, journal = {Commentarii mathematici Helvetici}, pages = {272--280}, publisher = {mathdoc}, volume = {69}, number = {4}, year = {1994}, zbl = {0819.58017}, url = {http://geodesic.mathdoc.fr/item/CMH_1994__69_4_140338/} }
J. Langer; D. Singer. Liouville integrability of geometric variational problems.. Commentarii mathematici Helvetici, Tome 69 (1994) no. 4, pp. 272-280. http://geodesic.mathdoc.fr/item/CMH_1994__69_4_140338/