Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1987__23_3_a0, author = {Chrastina, Jan}, title = {Another approach to the classical calculus of variations. {III}}, journal = {Archivum mathematicum}, pages = {131--145}, publisher = {mathdoc}, volume = {23}, number = {3}, year = {1987}, mrnumber = {930316}, zbl = {0693.58005}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1987__23_3_a0/} }
Chrastina, Jan. Another approach to the classical calculus of variations. III. Archivum mathematicum, Tome 23 (1987) no. 3, pp. 131-145. http://geodesic.mathdoc.fr/item/ARM_1987__23_3_a0/