@article{CC_2008_37_1_a2,
     author = {Thi, Hoang Van},
     title = {Approximate controllability for systems described by right invertible operators},
     journal = {Control and Cybernetics},
     pages = {39--50},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {2008},
     zbl = {1170.47060},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2008_37_1_a2/}
}