Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1981_256_6_a6, author = {V. G. Krotov}, title = {On differentiability of functions in $L^p$ and $H^p$ for $0<p<1$}, journal = {Doklady Akademii Nauk}, pages = {1311--1314}, publisher = {mathdoc}, volume = {256}, number = {6}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1981_256_6_a6/} }
V. G. Krotov. On differentiability of functions in $L^p$ and $H^p$ for $0