@article{CMUC_2004_45_4_a11,
     author = {Pavlica, David},
     title = {On the points of non-differentiability of convex functions},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {727--734},
     year = {2004},
     volume = {45},
     number = {4},
     mrnumber = {2103086},
     zbl = {1100.26006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2004_45_4_a11/}
}