@article{CMUC_1998_39_3_a3,
     author = {Holick\'y, P. and \v{S}m{\'\i}dek, M. and Zaj{\'\i}\v{c}ek, L.},
     title = {Convex functions with {non-Borel} set of {G\^ateaux} differentiability points},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {469--482},
     year = {1998},
     volume = {39},
     number = {3},
     mrnumber = {1666778},
     zbl = {0970.46026},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1998_39_3_a3/}
}