@article{ASNSP_1988_4_15_2_219_0,
     author = {Cesari, L. and Brandi, P. and Salvadori, A.},
     title = {Discontinuous solutions in problems of optimization},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {219--237},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 15},
     number = {2},
     year = {1988},
     mrnumber = {1007398},
     zbl = {0673.49020},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1988_4_15_2_219_0/}
}