@article{COCV_2007__13_1_1_0,
     author = {Nesi, Vincenzo and Rogora, Enrico},
     title = {A complete characterization of invariant jointly rank-r convex quadratic forms and applications to composite materials},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {1--34},
     publisher = {EDP-Sciences},
     volume = {13},
     number = {1},
     year = {2007},
     doi = {10.1051/cocv:2007002},
     mrnumber = {2282100},
     zbl = {1107.74039},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/cocv:2007002/}
}