@article{JCA_2012_19_4_JCA_2012_19_4_a8,
     author = {M. Ivanov and N. Zlateva},
     title = {Perturbation {Method} for {Variational} {Problems}},
     journal = {Journal of convex analysis},
     pages = {1033--1042},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {2012},
     url = {http://geodesic.mathdoc.fr/item/JCA_2012_19_4_JCA_2012_19_4_a8/}
}