@article{ASNSP_1985_4_12_1_137_0,
     author = {Alt, Hans Wilhelm and Caffarelli, Luis A. and Friedman, Avner},
     title = {Abrupt and smooth separation of free boundaries in flow problems},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {137--172},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 12},
     number = {1},
     year = {1985},
     mrnumber = {818805},
     zbl = {0608.35079},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1985_4_12_1_137_0/}
}