no. 2
Existence and estimates of Green's function for degenerate elliptic equations
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 15 (1988) no. 2, pp. 309-340. 
@article{ASNSP_1988_4_15_2_309_0,
     author = {Chanillo, S. and Wheeden, Richard L.},
     title = {Existence and estimates of {Green's} function for degenerate elliptic equations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {309--340},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 15},
     number = {2},
     year = {1988},
     zbl = {0688.35002},
     mrnumber = {1007400},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1988_4_15_2_309_0/}
}
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VL  - Ser. 4, 15
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Chanillo, S.; Wheeden, R. L. Existence and estimates of Green's function for degenerate elliptic equations. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 15 (1988) no. 2, pp. 309-340. http://www.numdam.org/item/ASNSP_1988_4_15_2_309_0/

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