@article{MS2_1974__35_166390,
     author = {J. Hoffmann-Jorgensen},
     title = {On the {Differentiability} {Points} of a {Function} of {Two} {Real} {Variables} {Admitting} {Partial} {Derivatives.}},
     journal = {Mathematica Scandinavica},
     pages = {259--266},
     publisher = {mathdoc},
     volume = {35},
     year = {1974},
     zbl = {0317.26012},
     url = {http://geodesic.mathdoc.fr/item/MS2_1974__35_166390/}
}