@article{01130737,
title = {Rank-one-convex and quasiconvex envelopes for functions depending on quadratic forms.},
journal = {Journal of Convex Analysis},
volume = {4},
year = {1997},
pages = {305-319},
zbl = {0903.49011},
language = {en},
url = {http://dml.mathdoc.fr/item/01130737}
}
Bousselsal, M.; Brighi, B. Rank-one-convex and quasiconvex envelopes for functions depending on quadratic forms.. Journal of Convex Analysis, Tome 4 (1997) pp. 305-319. http://gdmltest.u-ga.fr/item/01130737/