@article{SL_1961__3__A9_0,
     author = {Zygmund, Antoni},
     title = {Sur la diff\'erentiabilit\'e des fonctions},
     journal = {S\'eminaire Lelong. Analyse},
     note = {talk:12},
     pages = {1--8},
     publisher = {Secr\'etariat math\'ematique},
     volume = {3},
     year = {1961},
     language = {fr},
     url = {http://www.numdam.org/item/SL_1961__3__A9_0/}
}