@article{YJOR_2001_11_1_a0,
     author = {Leonid D. Popov},
     title = {On {Bilevel} {Variational} {Inequalities} {Arising} in the {Analysis} of {Improper} {Optimization} {Problems}},
     journal = {Yugoslav journal of operations research},
     pages = {3 },
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2001},
     zbl = {1036.58013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_2001_11_1_a0/}
}