@article{CC_2008_37_2_a7,
     author = {Krumbiegel, Klaus and R\"osch, Arnd},
     title = {On the regularization error of state constrained {Neumann} control problems},
     journal = {Control and Cybernetics},
     pages = {369--392},
     publisher = {mathdoc},
     volume = {37},
     number = {2},
     year = {2008},
     zbl = {1235.49063},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2008_37_2_a7/}
}