Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1936__41_168673, author = {A. S. Besicovitch}, title = {On differentiation of functions of two variables}, journal = {Mathematische Zeitschrift}, pages = {402--404}, publisher = {mathdoc}, volume = {41}, year = {1936}, zbl = {0014.10602}, url = {http://geodesic.mathdoc.fr/item/MZ_1936__41_168673/} }
A. S. Besicovitch. On differentiation of functions of two variables. Mathematische Zeitschrift, Tome 41 (1936), pp. 402-404. http://geodesic.mathdoc.fr/item/MZ_1936__41_168673/