Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1976__12_2_a5, author = {Krupka, Demeter}, title = {On a class of variational problems defined by polynomial {Lagrangians}}, journal = {Archivum mathematicum}, pages = {99--105}, publisher = {mathdoc}, volume = {12}, number = {2}, year = {1976}, mrnumber = {0426039}, zbl = {0386.49028}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1976__12_2_a5/} }
Krupka, Demeter. On a class of variational problems defined by polynomial Lagrangians. Archivum mathematicum, Tome 12 (1976) no. 2, pp. 99-105. http://geodesic.mathdoc.fr/item/ARM_1976__12_2_a5/