no. 1
Uniqueness for positive solutions of p-Laplacian problem in an annulus
Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 6, Tome 8 (1999) no. 1, pp. 143-154. 
@article{AFST_1999_6_8_1_143_0,
     author = {Nabana, Eric},
     title = {Uniqueness for positive solutions of $p${-Laplacian} problem in an annulus},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {143--154},
     publisher = {Universit\'e Paul Sabatier. Facult\'e des sciences},
     address = {Toulouse},
     volume = {Ser. 6, 8},
     number = {1},
     year = {1999},
     mrnumber = {1721558},
     zbl = {0958.35046},
     language = {en},
     url = {http://www.numdam.org/item/AFST_1999_6_8_1_143_0/}
}
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Nabana, Eric. Uniqueness for positive solutions of $p$-Laplacian problem in an annulus. Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 6, Tome 8 (1999) no. 1, pp. 143-154. http://www.numdam.org/item/AFST_1999_6_8_1_143_0/

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