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@article{MS2_1977__41_166549, author = {R.M. Dudley}, title = {On second derivates of convex functions.}, journal = {Mathematica Scandinavica}, pages = {159--174}, publisher = {mathdoc}, volume = {41}, year = {1977}, zbl = {0375.46039}, url = {http://geodesic.mathdoc.fr/item/MS2_1977__41_166549/} }
R.M. Dudley. On second derivates of convex functions.. Mathematica Scandinavica, Tome 41 (1977), pp. 159-174. http://geodesic.mathdoc.fr/item/MS2_1977__41_166549/