@article{701121,
     title = {A general topology approach to the study of differentiability of convex functions in Banach spaces},
     booktitle = {Abstracta. 6th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1978},
     pages = {55-59},
     url = {http://dml.mathdoc.fr/item/701121}
}

Kenderov, P. A general topology approach to the study of differentiability of convex functions in Banach spaces, dans Abstracta. 6th Winter School on Abstract Analysis, GDML_Books,  (1978), pp. 55-59. http://gdmltest.u-ga.fr/item/701121/