@article{COCV_2008__14_3_575_0,
     author = {Casas, Eduardo},
     title = {Necessary and sufficient optimality conditions for elliptic control problems with finitely many pointwise state constraints},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {575--589},
     publisher = {EDP-Sciences},
     volume = {14},
     number = {3},
     year = {2008},
     doi = {10.1051/cocv:2007063},
     mrnumber = {2434067},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/cocv:2007063/}
}