%0 Journal Article %A Zajíček, Luděk %T On sets of non-differentiability of Lipschitz and convex functions %J Mathematica Bohemica %D 2007 %P 75-85 %V 132 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.2007.133997/ %R 10.21136/MB.2007.133997 %G en %F 10_21136_MB_2007_133997