@article{COCV_2007__13_2_343_0,
     author = {Celada, Pietro and Cupini, Giovanni and Guidorzi, Marcello},
     title = {Existence and regularity of minimizers of nonconvex integrals with $p-q$ growth},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {343--358},
     publisher = {EDP-Sciences},
     volume = {13},
     number = {2},
     year = {2007},
     doi = {10.1051/cocv:2007014},
     mrnumber = {2306640},
     zbl = {1124.49031},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv:2007014/}
}