@article{JCA_2008_15_1_JCA_2008_15_1_a0,
     author = {L. Zaj{\'\i}cek},
     title = {Differentiability of {Approximately} {Convex,} {Semiconcave} and {Strongly} {Paraconvex} {Functions}},
     journal = {Journal of convex analysis},
     pages = {1--15},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2008},
     url = {http://geodesic.mathdoc.fr/item/JCA_2008_15_1_JCA_2008_15_1_a0/}
}