@article{COCV_1998__3__163_0,
     author = {Asch, M. and Lebeau, G.},
     title = {Geometrical aspects of exact boundary controllability for the wave equation. {A} numerical study},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {163--212},
     publisher = {EDP-Sciences},
     volume = {3},
     year = {1998},
     mrnumber = {1624783},
     zbl = {1052.93501},
     language = {en},
     url = {http://archive.numdam.org/item/COCV_1998__3__163_0/}
}