The free boundary of a semilinear elliptic equation
Variational methods for equilibrum problems of fluids - Trento, 20-25 juin 1983, Astérisque, no. 118 (1984), pp. 205-210 
@incollection{AST_1984__118__205_0,
     author = {Phillips, D.},
     title = {The free boundary of a semilinear elliptic equation},
     booktitle = {Variational methods for equilibrum problems of fluids - Trento, 20-25 juin 1983},
     series = {Ast\'erisque},
     pages = {205--210},
     year = {1984},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {118},
     mrnumber = {761750},
     zbl = {0561.35033},
     language = {en},
     url = {https://www.numdam.org/item/AST_1984__118__205_0/}
}
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BT  - Variational methods for equilibrum problems of fluids - Trento, 20-25 juin 1983
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%B Variational methods for equilibrum problems of fluids - Trento, 20-25 juin 1983
%A Collectif
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%F AST_1984__118__205_0
Phillips, D. The free boundary of a semilinear elliptic equation, dans Variational methods for equilibrum problems of fluids - Trento, 20-25 juin 1983, Astérisque, no. 118 (1984), pp. 205-210. https://www.numdam.org/item/AST_1984__118__205_0/

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[3] A. Friedman and D. Phillips, The free boundary of a semilinear elliptic equation, to appear in Trans. Amer. Math. Soc. | MR | Zbl

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