@article{JCA_2001_8_1_JCA_2001_8_1_a10,
     author = {U. W\"urker},
     title = {Convexity {Properties} of {Some} {Implicit} {Functions}},
     journal = {Journal of convex analysis},
     pages = {241--254},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/JCA_2001_8_1_JCA_2001_8_1_a10/}
}