@article{NUMA_1977__29_132532,
     author = {H.D. Mittelmann},
     title = {On the {Approximate} {Solution} of {Nonlinear} {Variational} {Inequalities.}},
     journal = {Numerische Mathematik},
     pages = {451--462},
     publisher = {mathdoc},
     volume = {29},
     year = {1977},
     zbl = {0354.65054},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1977__29_132532/}
}