@article{AIHPC_1989__6_2_153_0,
     author = {Komornik, V.},
     title = {Exact controllability in short time for the wave equation},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {153--164},
     publisher = {Gauthier-Villars},
     volume = {6},
     number = {2},
     year = {1989},
     mrnumber = {991876},
     zbl = {0672.49025},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1989__6_2_153_0/}
}