@article{COCV_1998__3__329_0,
     author = {Volle, M.},
     title = {Duality for the level sum of quasiconvex functions and applications},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {329--343},
     publisher = {EDP-Sciences},
     volume = {3},
     year = {1998},
     mrnumber = {1641843},
     zbl = {0904.49023},
     language = {en},
     url = {http://www.numdam.org/item/COCV_1998__3__329_0/}
}