Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1982__260_163665, author = {Viorel Barbu}, title = {Necessary {Conditions} for {Multiple} {Integral} {Problem} in the {Calculus} of {Variations.}}, journal = {Mathematische Annalen}, pages = {175--190}, publisher = {mathdoc}, volume = {260}, year = {1982}, zbl = {0471.49021}, url = {http://geodesic.mathdoc.fr/item/MAN_1982__260_163665/} }
Viorel Barbu. Necessary Conditions for Multiple Integral Problem in the Calculus of Variations.. Mathematische Annalen, Tome 260 (1982), pp. 175-190. http://geodesic.mathdoc.fr/item/MAN_1982__260_163665/