@article{COCV_2008__14_3_517_0,
     author = {Peichl, Gunther H. and Kunisch, Karl and Ito, Kazufumi},
     title = {Variational approach to shape derivatives},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {517--539},
     publisher = {EDP-Sciences},
     volume = {14},
     number = {3},
     year = {2008},
     doi = {10.1051/cocv:2008002},
     mrnumber = {2434064},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv:2008002/}
}