@article{GDZPPN002211920,
title = {Weak minima of variational integrals.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {450},
year = {1994},
pages = {143-162},
zbl = {0802.35016},
url = {http://dml.mathdoc.fr/item/GDZPPN002211920}
}
Sbordone, C.; Iwaniec, T. Weak minima of variational integrals.. Journal für die reine und angewandte Mathematik, Tome 450 (1994) pp. 143-162. http://gdmltest.u-ga.fr/item/GDZPPN002211920/