@article{05381090,
title = {Quasiconvex functions and null Lagrangians in the stability problems of classes of mappings.},
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {49},
year = {2008},
pages = {796-812},
zbl = {1164.35303},
language = {en},
url = {http://dml.mathdoc.fr/item/05381090}
}
Egorov, A.A. Quasiconvex functions and null Lagrangians in the stability problems of classes of mappings.. Sibirskij Matematicheskij Zhurnal, Tome 49 (2008) pp. 796-812. http://gdmltest.u-ga.fr/item/05381090/