On the new convergence criteria for Fourier series of Hardy and Littlewood
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 2, Volume 4 (1935) no. 4, p. 373-382
@article{ASNSP_1935_2_4_4_373_0,
     author = {Morgan, Gilbert Walter},
     title = {On the new convergence criteria for Fourier series of Hardy and Littlewood},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     publisher = {Scuola normale superiore},
     volume = {Ser. 2, 4},
     number = {4},
     year = {1935},
     pages = {373-382},
     zbl = {0012.40202},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1935_2_4_4_373_0}
}
Morgan, Gilbert Walter. On the new convergence criteria for Fourier series of Hardy and Littlewood. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 2, Volume 4 (1935) no. 4, pp. 373-382. http://www.numdam.org/item/ASNSP_1935_2_4_4_373_0/

1 G.H. Hardy and J.E. Littlewood: Notes on the theory of series (XVII) : Some new convergence criteria for Fourier series. Journal London Math. Soc., 7 (1932), 252-256. | JFM 58.0270.02 | Zbl 0005.39402

2 - - Some new convergence criteria for Fourier series. Annali della R. Scuola Normale Superiore di Pisa (2), 3 (1934). 43-62. | Numdam

3 J. Tannery and J. Molk: Fonctions elliptiques. (Paris, 1896), Vol. 2.

4 G. Valiron: Remarques sur la sommation des séries divergentes par les méthodes de M. Borel. Rendiconti di Palermo, 42 (1917), 267-284. | JFM 46.0487.01