@article{JCA_2008_15_2_JCA_2008_15_2_a4,
     author = {R. Goebel and R. T. Rockafellar},
     title = {Local {Strong} {Convexity} and {Local} {Lipschitz} {Continuity} of the {Gradient} of {Convex} {Functions}},
     journal = {Journal of convex analysis},
     pages = {263--27},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2008},
     url = {http://geodesic.mathdoc.fr/item/JCA_2008_15_2_JCA_2008_15_2_a4/}
}