@article{CC_2008_37_4_a12,
     author = {Neitzel, Ira and Tr\"oltzsch, Fredi},
     title = {On convergence of regularization methods for nonlinear parabolic optimal control problems with control and state constraints},
     journal = {Control and Cybernetics},
     pages = {1013--1043},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {2008},
     zbl = {1188.49029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2008_37_4_a12/}
}