@article{ASNSP_1984_4_11_1_1_0,
     author = {Alt, Hans Wilhelm and Caffarelli, Luis A. and Friedman, Avner},
     title = {A free boundary problem for quasi-linear elliptic equations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {1--44},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 11},
     number = {1},
     year = {1984},
     zbl = {0554.35129},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1984_4_11_1_1_0/}
}