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},
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     number = {4},
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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. http://www.numdam.org/item/ASNSP_1982_4_9_4_571_0/

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