@article{702416,
title = {On differentiability of the extremals of variational integrals},
booktitle = {Nonlinear Analysis, Function Spaces and Applications},
series = {GDML\_Books},
publisher = {BSB B. G. Teubner Verlagsgesellschaft},
address = {Leipzig},
year = {1982},
pages = {38-92},
mrnumber = {MR684997},
zbl = {0494.49032},
url = {http://dml.mathdoc.fr/item/702416}
}
Giaquinta, Mariano. On differentiability of the extremals of variational integrals, dans Nonlinear Analysis, Function Spaces and Applications, GDML_Books, (1982), pp. 38-92. http://gdmltest.u-ga.fr/item/702416/