@article{ASNSP_1947_2_12_3-4_147_0,
     author = {Maximoff, Isaiah},
     title = {On continuous transformation of some functions into an ordinary derivative},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     publisher = {Scuola normale superiore},
     volume = {Ser. 2, 12},
     number = {3-4},
     year = {1947},
     pages = {147-160},
     zbl = {0063.03853},
     mrnumber = {23895},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1947_2_12_3-4_147_0}
}

Maximoff, Isaiah. On continuous transformation of some functions into an ordinary derivative. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 2, Volume 12 (1947) no. 3-4, pp. 147-160. http://www.numdam.org/item/ASNSP_1947_2_12_3-4_147_0/