@article{ASNSP_1997_4_25_3-4_631_0,
     author = {Marino, Antonio and Saccon, Claudio},
     title = {Some variational theorems of mixed type and elliptic problems with jumping nonlinearities},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {631--665},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 25},
     number = {3-4},
     year = {1997},
     mrnumber = {1655535},
     zbl = {1033.35026},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1997_4_25_3-4_631_0/}
}