@Article{ MR2855887, author = {Neitzel, Ira and Pr{\"u}fert, Uwe and Slawig, Thomas}, title = {A smooth regularization of the projection formula for constrained parabolic optimal control problems}, journal = {Numer. Funct. Anal. Optim.}, fjournal = {Numerical Functional Analysis and Optimization. An International Journal}, volume = {32}, year = {2011}, number = {12}, pages = {1283--1315}, issn = {0163-0563}, coden = {NFADOL}, mrclass = {49M30 (35K20 49M05)}, mrnumber = {2855887 (2012j:49083)}, mrreviewer = {Uldis {\"E}. Raitums}, doi = {10.1080/01630563.2011.597915}, url = {http://dx.doi.org/10.1080/01630563.2011.597915}, annote = {journal} }