@article{NUMA_1990__57_6-7_133461,
     author = {C. Vuik},
     title = {An {L2-Error} {Estimate} for an {Approximation} of the {Solution} of a {Parabolic} {Variational} {Inequality.}},
     journal = {Numerische Mathematik},
     pages = {453--472},
     publisher = {mathdoc},
     volume = {57},
     number = {6-7},
     year = {1990},
     zbl = {0696.65069},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1990__57_6-7_133461/}
}