@article{JCA_1997_4_2_a6,
     author = {M. Bousselsal and B. Brighi},
     title = {Rank-One-Convex and {Quasiconvex} {Envelopes} for {Functions} {Depending} on {Quadratic} {Forms}},
     journal = {Journal of convex analysis},
     pages = {305--321},
     year = {1997},
     volume = {4},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JCA_1997_4_2_a6/}
}