@article{ASNSP_1980_4_7_3_523_0,
     author = {Caffarelli, Luis A. and Gilardi, Gianni},
     title = {Monotonicity of the free boundary in the two-dimensional dam problem},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {523--537},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 7},
     number = {3},
     year = {1980},
     mrnumber = {597551},
     zbl = {0513.76090},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1980_4_7_3_523_0/}
}