@article{JCA_2009_16_1_JCA_2009_16_1_a12,
     author = {J. Duda and L. Zaj{\'\i}cek},
     title = {Semiconvex {Functions:} {Representations} as {Suprema} of {Smooth} {Functions} and {Extensions}},
     journal = {Journal of convex analysis},
     pages = {239--26},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {2009},
     url = {http://geodesic.mathdoc.fr/item/JCA_2009_16_1_JCA_2009_16_1_a12/}
}