@article{JCA_2001_8_1_JCA_2001_8_1_a8,
     author = {G. Colombo and V. V. Goncharov},
     title = {Variational {Inequalities} and {Regularity} {Properties} of {Closed} {Sets} in {Hilbert} {Spaces}},
     journal = {Journal of convex analysis},
     pages = {197--222},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/JCA_2001_8_1_JCA_2001_8_1_a8/}
}