no. 2
Imbedding theorems for general Sobolev weight spaces
Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Serie 3, Volume 23 (1969) no. 2, pp. 373-386. 
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     author = {Kufner, Alois},
     title = {Imbedding theorems for general {Sobolev} weight spaces},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {373--386},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 23},
     number = {2},
     year = {1969},
     zbl = {0198.46205},
     mrnumber = {253038},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1969_3_23_2_373_0/}
}
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%D 1969
%P 373-386
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Kufner, Alois. Imbedding theorems for general Sobolev weight spaces. Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Serie 3, Volume 23 (1969) no. 2, pp. 373-386. http://www.numdam.org/item/ASNSP_1969_3_23_2_373_0/

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