no. 4
Comparison theorems for some quasilinear degenerate elliptic operators and applications to symmetry and monotonicity results
Annales de l'I.H.P. Analyse non linéaire, Tome 15 (1998) no. 4, pp. 493-516. 
@article{AIHPC_1998__15_4_493_0,
     author = {Damascelli, Lucio},
     title = {Comparison theorems for some quasilinear degenerate elliptic operators and applications to symmetry and monotonicity results},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {493--516},
     publisher = {Gauthier-Villars},
     volume = {15},
     number = {4},
     year = {1998},
     zbl = {0911.35009},
     mrnumber = {1632933},
     language = {en},
     url = {www.numdam.org/item/AIHPC_1998__15_4_493_0/}
}
Damascelli, Lucio. Comparison theorems for some quasilinear degenerate elliptic operators and applications to symmetry and monotonicity results. Annales de l'I.H.P. Analyse non linéaire, Tome 15 (1998) no. 4, pp. 493-516. http://www.numdam.org/item/AIHPC_1998__15_4_493_0/

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