@article{10_4064_ap_62_2_111_121,
     author = {S. Mig\'orski},
     title = {Convergence of optimal solutions in control problems for hyperbolic equations},
     journal = {Annales Polonici Mathematici},
     pages = {111--121},
     publisher = {mathdoc},
     volume = {62},
     number = {2},
     year = {1995},
     doi = {10.4064/ap-62-2-111-121},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-62-2-111-121/}
}