@article{GDZPPN002353016,
title = {On the Differentiability Points of a Function of Two Real Variables Admitting Partial Derivatives.},
journal = {Mathematica Scandinavica},
volume = {34},
year = {1974},
pages = {259-266},
zbl = {0317.26012},
url = {http://dml.mathdoc.fr/item/GDZPPN002353016}
}
Hoffmann-Jorgensen, J. On the Differentiability Points of a Function of Two Real Variables Admitting Partial Derivatives.. Mathematica Scandinavica, Tome 34 (1974) pp. 259-266. http://gdmltest.u-ga.fr/item/GDZPPN002353016/