@article{EJDE_2001__2001__a17,
     author = {Bejenaru, Ioan and Diaz, Jesus Ildefonso and Vrabie, Ioan I.},
     title = {An abstract approximate controllability result and applications to elliptic and parabolic systems with dynamic boundary conditions},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2001},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2001__2001__a17/}
}