@article{GDZPPN002028190,
title = {Integral Formulae Associated with the Euler-Lagrange Operators of Multiple Integral Problems in the Calculus of Variations.},
journal = {Aequationes mathematicae},
volume = {10},
year = {1974},
pages = {212-229},
zbl = {0293.49001},
url = {http://dml.mathdoc.fr/item/GDZPPN002028190}
}
Rund, Hanno. Integral Formulae Associated with the Euler-Lagrange Operators of Multiple Integral Problems in the Calculus of Variations.. Aequationes mathematicae, Tome 10 (1974) pp. 212-229. http://gdmltest.u-ga.fr/item/GDZPPN002028190/