no. 4
The behavior of the free boundary for the dam problem
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 9 (1982) no. 4, pp. 571-626 
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     title = {The behavior of the free boundary for the dam problem},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {571--626},
     year = {1982},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 9},
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     mrnumber = {693780},
     zbl = {0521.76092},
     language = {en},
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Alt, Hans Wilhelm; Gilardi, Gianni. The behavior of the free boundary for the dam problem. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 9 (1982) no. 4, pp. 571-626. https://www.numdam.org/item/ASNSP_1982_4_9_4_571_0/

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