A generalization of lemmas of Marcinkiewicz and Fine with applications to singular integrals
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 3, Volume 11 (1957) no. 3-4, p. 117-135 
@article{ASNSP_1957_3_11_3-4_117_0,
     author = {Ostrow, E. H. and Stein, Elias M.},
     title = {A generalization of lemmas of Marcinkiewicz and Fine with applications to singular integrals},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 11},
     number = {3-4},
     year = {1957},
     pages = {117-135},
     zbl = {0082.05502},
     mrnumber = {101454},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1957_3_11_3-4_117_0}
}

Ostrow, E. H.; Stein, E. M. A generalization of lemmas of Marcinkiewicz and Fine with applications to singular integrals. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 3, Volume 11 (1957) no. 3-4, pp. 117-135. http://www.numdam.org/item/ASNSP_1957_3_11_3-4_117_0/

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