@article{JCA_1998_5_2_a7,
     author = {M. Bergounioux and H. Dietrich},
     title = {Optimal {Control} of {Problems} {Governed} by {Obstacle} {Type} {Variational} {Inequalities:} a {Dual} {Regularization-Penalization} {Approach}},
     journal = {Journal of convex analysis},
     pages = {329--352},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1998},
     url = {http://geodesic.mathdoc.fr/item/JCA_1998_5_2_a7/}
}